src/HOL/Predicate.thy
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(*  Title:      HOL/Predicate.thy
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    Author:     Stefan Berghofer and Lukas Bulwahn and Florian Haftmann, TU Muenchen
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*)
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header {* Predicates as relations and enumerations *}
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theory Predicate
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imports Inductive Relation
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begin
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notation
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  bot ("\<bottom>") and
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  top ("\<top>") and
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  inf (infixl "\<sqinter>" 70) and
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  sup (infixl "\<squnion>" 65) and
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  Inf ("\<Sqinter>_" [900] 900) and
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  Sup ("\<Squnion>_" [900] 900)
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syntax (xsymbols)
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  "_INF1"     :: "pttrns \<Rightarrow> 'b \<Rightarrow> 'b"           ("(3\<Sqinter>_./ _)" [0, 10] 10)
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  "_INF"      :: "pttrn \<Rightarrow> 'a set \<Rightarrow> 'b \<Rightarrow> 'b"  ("(3\<Sqinter>_\<in>_./ _)" [0, 0, 10] 10)
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  "_SUP1"     :: "pttrns \<Rightarrow> 'b \<Rightarrow> 'b"           ("(3\<Squnion>_./ _)" [0, 10] 10)
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  "_SUP"      :: "pttrn \<Rightarrow> 'a set \<Rightarrow> 'b \<Rightarrow> 'b"  ("(3\<Squnion>_\<in>_./ _)" [0, 0, 10] 10)
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subsection {* Predicates as (complete) lattices *}
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text {*
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  Handy introduction and elimination rules for @{text "\<le>"}
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  on unary and binary predicates
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*}
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lemma predicate1I:
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  assumes PQ: "\<And>x. P x \<Longrightarrow> Q x"
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  shows "P \<le> Q"
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  apply (rule le_funI)
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  apply (rule le_boolI)
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  apply (rule PQ)
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  apply assumption
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  done
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lemma predicate1D [Pure.dest?, dest?]:
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  "P \<le> Q \<Longrightarrow> P x \<Longrightarrow> Q x"
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  apply (erule le_funE)
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  apply (erule le_boolE)
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  apply assumption+
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  done
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lemma rev_predicate1D:
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  "P x ==> P <= Q ==> Q x"
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  by (rule predicate1D)
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lemma predicate2I [Pure.intro!, intro!]:
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  assumes PQ: "\<And>x y. P x y \<Longrightarrow> Q x y"
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  shows "P \<le> Q"
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  apply (rule le_funI)+
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  apply (rule le_boolI)
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  apply (rule PQ)
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  apply assumption
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  done
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lemma predicate2D [Pure.dest, dest]:
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  "P \<le> Q \<Longrightarrow> P x y \<Longrightarrow> Q x y"
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  apply (erule le_funE)+
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  apply (erule le_boolE)
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  apply assumption+
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  done
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lemma rev_predicate2D:
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  "P x y ==> P <= Q ==> Q x y"
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  by (rule predicate2D)
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subsubsection {* Equality *}
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lemma pred_equals_eq: "((\<lambda>x. x \<in> R) = (\<lambda>x. x \<in> S)) = (R = S)"
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  by (simp add: mem_def)
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lemma pred_equals_eq2 [pred_set_conv]: "((\<lambda>x y. (x, y) \<in> R) = (\<lambda>x y. (x, y) \<in> S)) = (R = S)"
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  by (simp add: fun_eq_iff mem_def)
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subsubsection {* Order relation *}
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lemma pred_subset_eq: "((\<lambda>x. x \<in> R) <= (\<lambda>x. x \<in> S)) = (R <= S)"
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  by (simp add: mem_def)
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lemma pred_subset_eq2 [pred_set_conv]: "((\<lambda>x y. (x, y) \<in> R) <= (\<lambda>x y. (x, y) \<in> S)) = (R <= S)"
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  by fast
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subsubsection {* Top and bottom elements *}
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lemma bot1E [no_atp, elim!]: "bot x \<Longrightarrow> P"
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  by (simp add: bot_fun_def)
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lemma bot2E [elim!]: "bot x y \<Longrightarrow> P"
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  by (simp add: bot_fun_def)
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lemma bot_empty_eq: "bot = (\<lambda>x. x \<in> {})"
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  by (auto simp add: fun_eq_iff)
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lemma bot_empty_eq2: "bot = (\<lambda>x y. (x, y) \<in> {})"
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  by (auto simp add: fun_eq_iff)
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lemma top1I [intro!]: "top x"
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  by (simp add: top_fun_def)
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lemma top2I [intro!]: "top x y"
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  by (simp add: top_fun_def)
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subsubsection {* Binary intersection *}
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lemma inf1I [intro!]: "A x ==> B x ==> inf A B x"
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  by (simp add: inf_fun_def)
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lemma inf2I [intro!]: "A x y ==> B x y ==> inf A B x y"
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  by (simp add: inf_fun_def)
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lemma inf1E [elim!]: "inf A B x ==> (A x ==> B x ==> P) ==> P"
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  by (simp add: inf_fun_def)
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lemma inf2E [elim!]: "inf A B x y ==> (A x y ==> B x y ==> P) ==> P"
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  by (simp add: inf_fun_def)
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lemma inf1D1: "inf A B x ==> A x"
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  by (simp add: inf_fun_def)
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lemma inf2D1: "inf A B x y ==> A x y"
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  by (simp add: inf_fun_def)
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lemma inf1D2: "inf A B x ==> B x"
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  by (simp add: inf_fun_def)
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lemma inf2D2: "inf A B x y ==> B x y"
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  by (simp add: inf_fun_def)
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lemma inf_Int_eq: "inf (\<lambda>x. x \<in> R) (\<lambda>x. x \<in> S) = (\<lambda>x. x \<in> R \<inter> S)"
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  by (simp add: inf_fun_def mem_def)
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lemma inf_Int_eq2 [pred_set_conv]: "inf (\<lambda>x y. (x, y) \<in> R) (\<lambda>x y. (x, y) \<in> S) = (\<lambda>x y. (x, y) \<in> R \<inter> S)"
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  by (simp add: inf_fun_def mem_def)
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subsubsection {* Binary union *}
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lemma sup1I1 [elim?]: "A x \<Longrightarrow> sup A B x"
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  by (simp add: sup_fun_def)
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lemma sup2I1 [elim?]: "A x y \<Longrightarrow> sup A B x y"
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  by (simp add: sup_fun_def)
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lemma sup1I2 [elim?]: "B x \<Longrightarrow> sup A B x"
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  by (simp add: sup_fun_def)
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lemma sup2I2 [elim?]: "B x y \<Longrightarrow> sup A B x y"
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  by (simp add: sup_fun_def)
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lemma sup1E [elim!]: "sup A B x ==> (A x ==> P) ==> (B x ==> P) ==> P"
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  by (simp add: sup_fun_def) iprover
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lemma sup2E [elim!]: "sup A B x y ==> (A x y ==> P) ==> (B x y ==> P) ==> P"
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  by (simp add: sup_fun_def) iprover
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text {*
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  \medskip Classical introduction rule: no commitment to @{text A} vs
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  @{text B}.
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*}
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lemma sup1CI [intro!]: "(~ B x ==> A x) ==> sup A B x"
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  by (auto simp add: sup_fun_def)
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lemma sup2CI [intro!]: "(~ B x y ==> A x y) ==> sup A B x y"
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  by (auto simp add: sup_fun_def)
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lemma sup_Un_eq: "sup (\<lambda>x. x \<in> R) (\<lambda>x. x \<in> S) = (\<lambda>x. x \<in> R \<union> S)"
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  by (simp add: sup_fun_def mem_def)
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lemma sup_Un_eq2 [pred_set_conv]: "sup (\<lambda>x y. (x, y) \<in> R) (\<lambda>x y. (x, y) \<in> S) = (\<lambda>x y. (x, y) \<in> R \<union> S)"
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  by (simp add: sup_fun_def mem_def)
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subsubsection {* Intersections of families *}
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lemma INF1_iff: "(INF x:A. B x) b = (ALL x:A. B x b)"
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  by (simp add: INFI_apply)
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lemma INF2_iff: "(INF x:A. B x) b c = (ALL x:A. B x b c)"
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  by (simp add: INFI_apply)
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lemma INF1_I [intro!]: "(!!x. x : A ==> B x b) ==> (INF x:A. B x) b"
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  by (auto simp add: INFI_apply)
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lemma INF2_I [intro!]: "(!!x. x : A ==> B x b c) ==> (INF x:A. B x) b c"
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  by (auto simp add: INFI_apply)
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lemma INF1_D [elim]: "(INF x:A. B x) b ==> a : A ==> B a b"
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  by (auto simp add: INFI_apply)
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lemma INF2_D [elim]: "(INF x:A. B x) b c ==> a : A ==> B a b c"
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  by (auto simp add: INFI_apply)
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lemma INF1_E [elim]: "(INF x:A. B x) b ==> (B a b ==> R) ==> (a ~: A ==> R) ==> R"
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  by (auto simp add: INFI_apply)
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lemma INF2_E [elim]: "(INF x:A. B x) b c ==> (B a b c ==> R) ==> (a ~: A ==> R) ==> R"
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  by (auto simp add: INFI_apply)
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lemma INF_INT_eq: "(INF i. (\<lambda>x. x \<in> r i)) = (\<lambda>x. x \<in> (INT i. r i))"
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  by (simp add: INFI_apply fun_eq_iff)
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lemma INF_INT_eq2: "(INF i. (\<lambda>x y. (x, y) \<in> r i)) = (\<lambda>x y. (x, y) \<in> (INT i. r i))"
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  by (simp add: INFI_apply fun_eq_iff)
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subsubsection {* Unions of families *}
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lemma SUP1_iff: "(SUP x:A. B x) b = (EX x:A. B x b)"
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  by (simp add: SUPR_apply)
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lemma SUP2_iff: "(SUP x:A. B x) b c = (EX x:A. B x b c)"
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  by (simp add: SUPR_apply)
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lemma SUP1_I [intro]: "a : A ==> B a b ==> (SUP x:A. B x) b"
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  by (auto simp add: SUPR_apply)
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lemma SUP2_I [intro]: "a : A ==> B a b c ==> (SUP x:A. B x) b c"
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  by (auto simp add: SUPR_apply)
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lemma SUP1_E [elim!]: "(SUP x:A. B x) b ==> (!!x. x : A ==> B x b ==> R) ==> R"
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  by (auto simp add: SUPR_apply)
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lemma SUP2_E [elim!]: "(SUP x:A. B x) b c ==> (!!x. x : A ==> B x b c ==> R) ==> R"
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  by (auto simp add: SUPR_apply)
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lemma SUP_UN_eq: "(SUP i. (\<lambda>x. x \<in> r i)) = (\<lambda>x. x \<in> (UN i. r i))"
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  by (simp add: SUPR_apply fun_eq_iff)
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lemma SUP_UN_eq2: "(SUP i. (\<lambda>x y. (x, y) \<in> r i)) = (\<lambda>x y. (x, y) \<in> (UN i. r i))"
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  by (simp add: SUPR_apply fun_eq_iff)
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subsection {* Predicates as relations *}
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subsubsection {* Composition  *}
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inductive
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  pred_comp  :: "['a => 'b => bool, 'b => 'c => bool] => 'a => 'c => bool"
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    (infixr "OO" 75)
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  for r :: "'a => 'b => bool" and s :: "'b => 'c => bool"
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where
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  pred_compI [intro]: "r a b ==> s b c ==> (r OO s) a c"
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inductive_cases pred_compE [elim!]: "(r OO s) a c"
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lemma pred_comp_rel_comp_eq [pred_set_conv]:
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  "((\<lambda>x y. (x, y) \<in> r) OO (\<lambda>x y. (x, y) \<in> s)) = (\<lambda>x y. (x, y) \<in> r O s)"
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  by (auto simp add: fun_eq_iff)
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subsubsection {* Converse *}
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inductive
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  conversep :: "('a => 'b => bool) => 'b => 'a => bool"
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    ("(_^--1)" [1000] 1000)
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  for r :: "'a => 'b => bool"
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where
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  conversepI: "r a b ==> r^--1 b a"
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notation (xsymbols)
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  conversep  ("(_\<inverse>\<inverse>)" [1000] 1000)
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lemma conversepD:
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  assumes ab: "r^--1 a b"
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  shows "r b a" using ab
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  by cases simp
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lemma conversep_iff [iff]: "r^--1 a b = r b a"
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  by (iprover intro: conversepI dest: conversepD)
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lemma conversep_converse_eq [pred_set_conv]:
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  "(\<lambda>x y. (x, y) \<in> r)^--1 = (\<lambda>x y. (x, y) \<in> r^-1)"
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  by (auto simp add: fun_eq_iff)
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lemma conversep_conversep [simp]: "(r^--1)^--1 = r"
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  by (iprover intro: order_antisym conversepI dest: conversepD)
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lemma converse_pred_comp: "(r OO s)^--1 = s^--1 OO r^--1"
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  by (iprover intro: order_antisym conversepI pred_compI
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    elim: pred_compE dest: conversepD)
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lemma converse_meet: "(inf r s)^--1 = inf r^--1 s^--1"
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  by (simp add: inf_fun_def) (iprover intro: conversepI ext dest: conversepD)
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lemma converse_join: "(sup r s)^--1 = sup r^--1 s^--1"
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  by (simp add: sup_fun_def) (iprover intro: conversepI ext dest: conversepD)
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lemma conversep_noteq [simp]: "(op ~=)^--1 = op ~="
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  by (auto simp add: fun_eq_iff)
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lemma conversep_eq [simp]: "(op =)^--1 = op ="
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  by (auto simp add: fun_eq_iff)
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subsubsection {* Domain *}
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inductive
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  DomainP :: "('a => 'b => bool) => 'a => bool"
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  for r :: "'a => 'b => bool"
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where
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  DomainPI [intro]: "r a b ==> DomainP r a"
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inductive_cases DomainPE [elim!]: "DomainP r a"
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lemma DomainP_Domain_eq [pred_set_conv]: "DomainP (\<lambda>x y. (x, y) \<in> r) = (\<lambda>x. x \<in> Domain r)"
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  by (blast intro!: Orderings.order_antisym predicate1I)
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subsubsection {* Range *}
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inductive
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  RangeP :: "('a => 'b => bool) => 'b => bool"
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  for r :: "'a => 'b => bool"
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where
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  RangePI [intro]: "r a b ==> RangeP r b"
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inductive_cases RangePE [elim!]: "RangeP r b"
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lemma RangeP_Range_eq [pred_set_conv]: "RangeP (\<lambda>x y. (x, y) \<in> r) = (\<lambda>x. x \<in> Range r)"
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  by (blast intro!: Orderings.order_antisym predicate1I)
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subsubsection {* Inverse image *}
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definition
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  inv_imagep :: "('b => 'b => bool) => ('a => 'b) => 'a => 'a => bool" where
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  "inv_imagep r f == %x y. r (f x) (f y)"
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lemma [pred_set_conv]: "inv_imagep (\<lambda>x y. (x, y) \<in> r) f = (\<lambda>x y. (x, y) \<in> inv_image r f)"
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  by (simp add: inv_image_def inv_imagep_def)
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lemma in_inv_imagep [simp]: "inv_imagep r f x y = r (f x) (f y)"
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  by (simp add: inv_imagep_def)
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subsubsection {* Powerset *}
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definition Powp :: "('a \<Rightarrow> bool) \<Rightarrow> 'a set \<Rightarrow> bool" where
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  "Powp A == \<lambda>B. \<forall>x \<in> B. A x"
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lemma Powp_Pow_eq [pred_set_conv]: "Powp (\<lambda>x. x \<in> A) = (\<lambda>x. x \<in> Pow A)"
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  by (auto simp add: Powp_def fun_eq_iff)
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lemmas Powp_mono [mono] = Pow_mono [to_pred pred_subset_eq]
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subsubsection {* Properties of relations *}
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abbreviation antisymP :: "('a => 'a => bool) => bool" where
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  "antisymP r == antisym {(x, y). r x y}"
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abbreviation transP :: "('a => 'a => bool) => bool" where
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  "transP r == trans {(x, y). r x y}"
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abbreviation single_valuedP :: "('a => 'b => bool) => bool" where
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  "single_valuedP r == single_valued {(x, y). r x y}"
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(*FIXME inconsistencies: abbreviations vs. definitions, suffix `P` vs. suffix `p`*)
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definition reflp :: "('a \<Rightarrow> 'a \<Rightarrow> bool) \<Rightarrow> bool" where
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  "reflp r \<longleftrightarrow> refl {(x, y). r x y}"
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definition symp :: "('a \<Rightarrow> 'a \<Rightarrow> bool) \<Rightarrow> bool" where
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  "symp r \<longleftrightarrow> sym {(x, y). r x y}"
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definition transp :: "('a \<Rightarrow> 'a \<Rightarrow> bool) \<Rightarrow> bool" where
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  "transp r \<longleftrightarrow> trans {(x, y). r x y}"
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lemma reflpI:
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haftmann
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  "(\<And>x. r x x) \<Longrightarrow> reflp r"
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  by (auto intro: refl_onI simp add: reflp_def)
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haftmann
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   384
lemma reflpE:
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haftmann
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   385
  assumes "reflp r"
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haftmann
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   386
  obtains "r x x"
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haftmann
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  using assms by (auto dest: refl_onD simp add: reflp_def)
f1fc2a1547eb moved generic definitions about relations from Quotient.thy to Predicate;
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   388
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haftmann
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   389
lemma sympI:
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haftmann
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   390
  "(\<And>x y. r x y \<Longrightarrow> r y x) \<Longrightarrow> symp r"
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haftmann
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   391
  by (auto intro: symI simp add: symp_def)
f1fc2a1547eb moved generic definitions about relations from Quotient.thy to Predicate;
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diff changeset
   392
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haftmann
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   393
lemma sympE:
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haftmann
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   394
  assumes "symp r" and "r x y"
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haftmann
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   395
  obtains "r y x"
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haftmann
parents: 40674
diff changeset
   396
  using assms by (auto dest: symD simp add: symp_def)
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haftmann
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diff changeset
   397
f1fc2a1547eb moved generic definitions about relations from Quotient.thy to Predicate;
haftmann
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diff changeset
   398
lemma transpI:
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haftmann
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diff changeset
   399
  "(\<And>x y z. r x y \<Longrightarrow> r y z \<Longrightarrow> r x z) \<Longrightarrow> transp r"
f1fc2a1547eb moved generic definitions about relations from Quotient.thy to Predicate;
haftmann
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diff changeset
   400
  by (auto intro: transI simp add: transp_def)
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haftmann
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diff changeset
   401
  
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haftmann
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   402
lemma transpE:
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haftmann
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diff changeset
   403
  assumes "transp r" and "r x y" and "r y z"
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haftmann
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diff changeset
   404
  obtains "r x z"
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haftmann
parents: 40674
diff changeset
   405
  using assms by (auto dest: transD simp add: transp_def)
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haftmann
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diff changeset
   406
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   407
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   408
subsection {* Predicates as enumerations *}
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   409
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   410
subsubsection {* The type of predicate enumerations (a monad) *}
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   411
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   412
datatype 'a pred = Pred "'a \<Rightarrow> bool"
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   413
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   414
primrec eval :: "'a pred \<Rightarrow> 'a \<Rightarrow> bool" where
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haftmann
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   415
  eval_pred: "eval (Pred f) = f"
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   416
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   417
lemma Pred_eval [simp]:
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haftmann
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   418
  "Pred (eval x) = x"
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haftmann
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   419
  by (cases x) simp
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   420
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   421
lemma pred_eqI:
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haftmann
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   422
  "(\<And>w. eval P w \<longleftrightarrow> eval Q w) \<Longrightarrow> P = Q"
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haftmann
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diff changeset
   423
  by (cases P, cases Q) (auto simp add: fun_eq_iff)
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   424
44033
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   425
instantiation pred :: (type) complete_lattice
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   426
begin
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   427
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haftmann
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   428
definition
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haftmann
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   429
  "P \<le> Q \<longleftrightarrow> eval P \<le> eval Q"
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haftmann
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diff changeset
   430
ab47f43f7581 added enumeration of predicates
haftmann
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diff changeset
   431
definition
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haftmann
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   432
  "P < Q \<longleftrightarrow> eval P < eval Q"
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haftmann
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diff changeset
   433
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haftmann
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   434
definition
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haftmann
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   435
  "\<bottom> = Pred \<bottom>"
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   436
40616
c5ee1e06d795 eval simp rules for predicate type, simplify primitive proofs
haftmann
parents: 39302
diff changeset
   437
lemma eval_bot [simp]:
c5ee1e06d795 eval simp rules for predicate type, simplify primitive proofs
haftmann
parents: 39302
diff changeset
   438
  "eval \<bottom>  = \<bottom>"
c5ee1e06d795 eval simp rules for predicate type, simplify primitive proofs
haftmann
parents: 39302
diff changeset
   439
  by (simp add: bot_pred_def)
c5ee1e06d795 eval simp rules for predicate type, simplify primitive proofs
haftmann
parents: 39302
diff changeset
   440
30328
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   441
definition
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   442
  "\<top> = Pred \<top>"
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   443
40616
c5ee1e06d795 eval simp rules for predicate type, simplify primitive proofs
haftmann
parents: 39302
diff changeset
   444
lemma eval_top [simp]:
c5ee1e06d795 eval simp rules for predicate type, simplify primitive proofs
haftmann
parents: 39302
diff changeset
   445
  "eval \<top>  = \<top>"
c5ee1e06d795 eval simp rules for predicate type, simplify primitive proofs
haftmann
parents: 39302
diff changeset
   446
  by (simp add: top_pred_def)
c5ee1e06d795 eval simp rules for predicate type, simplify primitive proofs
haftmann
parents: 39302
diff changeset
   447
30328
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   448
definition
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   449
  "P \<sqinter> Q = Pred (eval P \<sqinter> eval Q)"
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   450
40616
c5ee1e06d795 eval simp rules for predicate type, simplify primitive proofs
haftmann
parents: 39302
diff changeset
   451
lemma eval_inf [simp]:
c5ee1e06d795 eval simp rules for predicate type, simplify primitive proofs
haftmann
parents: 39302
diff changeset
   452
  "eval (P \<sqinter> Q) = eval P \<sqinter> eval Q"
c5ee1e06d795 eval simp rules for predicate type, simplify primitive proofs
haftmann
parents: 39302
diff changeset
   453
  by (simp add: inf_pred_def)
c5ee1e06d795 eval simp rules for predicate type, simplify primitive proofs
haftmann
parents: 39302
diff changeset
   454
30328
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   455
definition
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   456
  "P \<squnion> Q = Pred (eval P \<squnion> eval Q)"
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   457
40616
c5ee1e06d795 eval simp rules for predicate type, simplify primitive proofs
haftmann
parents: 39302
diff changeset
   458
lemma eval_sup [simp]:
c5ee1e06d795 eval simp rules for predicate type, simplify primitive proofs
haftmann
parents: 39302
diff changeset
   459
  "eval (P \<squnion> Q) = eval P \<squnion> eval Q"
c5ee1e06d795 eval simp rules for predicate type, simplify primitive proofs
haftmann
parents: 39302
diff changeset
   460
  by (simp add: sup_pred_def)
c5ee1e06d795 eval simp rules for predicate type, simplify primitive proofs
haftmann
parents: 39302
diff changeset
   461
30328
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   462
definition
37767
a2b7a20d6ea3 dropped superfluous [code del]s
haftmann
parents: 37549
diff changeset
   463
  "\<Sqinter>A = Pred (INFI A eval)"
30328
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   464
40616
c5ee1e06d795 eval simp rules for predicate type, simplify primitive proofs
haftmann
parents: 39302
diff changeset
   465
lemma eval_Inf [simp]:
c5ee1e06d795 eval simp rules for predicate type, simplify primitive proofs
haftmann
parents: 39302
diff changeset
   466
  "eval (\<Sqinter>A) = INFI A eval"
c5ee1e06d795 eval simp rules for predicate type, simplify primitive proofs
haftmann
parents: 39302
diff changeset
   467
  by (simp add: Inf_pred_def)
c5ee1e06d795 eval simp rules for predicate type, simplify primitive proofs
haftmann
parents: 39302
diff changeset
   468
30328
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   469
definition
37767
a2b7a20d6ea3 dropped superfluous [code del]s
haftmann
parents: 37549
diff changeset
   470
  "\<Squnion>A = Pred (SUPR A eval)"
30328
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   471
40616
c5ee1e06d795 eval simp rules for predicate type, simplify primitive proofs
haftmann
parents: 39302
diff changeset
   472
lemma eval_Sup [simp]:
c5ee1e06d795 eval simp rules for predicate type, simplify primitive proofs
haftmann
parents: 39302
diff changeset
   473
  "eval (\<Squnion>A) = SUPR A eval"
c5ee1e06d795 eval simp rules for predicate type, simplify primitive proofs
haftmann
parents: 39302
diff changeset
   474
  by (simp add: Sup_pred_def)
c5ee1e06d795 eval simp rules for predicate type, simplify primitive proofs
haftmann
parents: 39302
diff changeset
   475
44033
bc45393f497b more fine-granular instantiation
haftmann
parents: 44026
diff changeset
   476
instance proof
bc45393f497b more fine-granular instantiation
haftmann
parents: 44026
diff changeset
   477
qed (auto intro!: pred_eqI simp add: less_eq_pred_def less_pred_def)
bc45393f497b more fine-granular instantiation
haftmann
parents: 44026
diff changeset
   478
bc45393f497b more fine-granular instantiation
haftmann
parents: 44026
diff changeset
   479
end
bc45393f497b more fine-granular instantiation
haftmann
parents: 44026
diff changeset
   480
bc45393f497b more fine-granular instantiation
haftmann
parents: 44026
diff changeset
   481
lemma eval_INFI [simp]:
bc45393f497b more fine-granular instantiation
haftmann
parents: 44026
diff changeset
   482
  "eval (INFI A f) = INFI A (eval \<circ> f)"
bc45393f497b more fine-granular instantiation
haftmann
parents: 44026
diff changeset
   483
  by (unfold INFI_def) simp
bc45393f497b more fine-granular instantiation
haftmann
parents: 44026
diff changeset
   484
bc45393f497b more fine-granular instantiation
haftmann
parents: 44026
diff changeset
   485
lemma eval_SUPR [simp]:
bc45393f497b more fine-granular instantiation
haftmann
parents: 44026
diff changeset
   486
  "eval (SUPR A f) = SUPR A (eval \<circ> f)"
bc45393f497b more fine-granular instantiation
haftmann
parents: 44026
diff changeset
   487
  by (unfold SUPR_def) simp
bc45393f497b more fine-granular instantiation
haftmann
parents: 44026
diff changeset
   488
bc45393f497b more fine-granular instantiation
haftmann
parents: 44026
diff changeset
   489
instantiation pred :: (type) complete_boolean_algebra
bc45393f497b more fine-granular instantiation
haftmann
parents: 44026
diff changeset
   490
begin
bc45393f497b more fine-granular instantiation
haftmann
parents: 44026
diff changeset
   491
32578
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   492
definition
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   493
  "- P = Pred (- eval P)"
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   494
40616
c5ee1e06d795 eval simp rules for predicate type, simplify primitive proofs
haftmann
parents: 39302
diff changeset
   495
lemma eval_compl [simp]:
c5ee1e06d795 eval simp rules for predicate type, simplify primitive proofs
haftmann
parents: 39302
diff changeset
   496
  "eval (- P) = - eval P"
c5ee1e06d795 eval simp rules for predicate type, simplify primitive proofs
haftmann
parents: 39302
diff changeset
   497
  by (simp add: uminus_pred_def)
c5ee1e06d795 eval simp rules for predicate type, simplify primitive proofs
haftmann
parents: 39302
diff changeset
   498
32578
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   499
definition
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   500
  "P - Q = Pred (eval P - eval Q)"
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   501
40616
c5ee1e06d795 eval simp rules for predicate type, simplify primitive proofs
haftmann
parents: 39302
diff changeset
   502
lemma eval_minus [simp]:
c5ee1e06d795 eval simp rules for predicate type, simplify primitive proofs
haftmann
parents: 39302
diff changeset
   503
  "eval (P - Q) = eval P - eval Q"
c5ee1e06d795 eval simp rules for predicate type, simplify primitive proofs
haftmann
parents: 39302
diff changeset
   504
  by (simp add: minus_pred_def)
c5ee1e06d795 eval simp rules for predicate type, simplify primitive proofs
haftmann
parents: 39302
diff changeset
   505
32578
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   506
instance proof
44033
bc45393f497b more fine-granular instantiation
haftmann
parents: 44026
diff changeset
   507
qed (auto intro!: pred_eqI simp add: uminus_apply minus_apply)
30328
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   508
22259
476604be7d88 New theory for converting between predicates and sets.
berghofe
parents:
diff changeset
   509
end
30328
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   510
40616
c5ee1e06d795 eval simp rules for predicate type, simplify primitive proofs
haftmann
parents: 39302
diff changeset
   511
definition single :: "'a \<Rightarrow> 'a pred" where
c5ee1e06d795 eval simp rules for predicate type, simplify primitive proofs
haftmann
parents: 39302
diff changeset
   512
  "single x = Pred ((op =) x)"
c5ee1e06d795 eval simp rules for predicate type, simplify primitive proofs
haftmann
parents: 39302
diff changeset
   513
c5ee1e06d795 eval simp rules for predicate type, simplify primitive proofs
haftmann
parents: 39302
diff changeset
   514
lemma eval_single [simp]:
c5ee1e06d795 eval simp rules for predicate type, simplify primitive proofs
haftmann
parents: 39302
diff changeset
   515
  "eval (single x) = (op =) x"
c5ee1e06d795 eval simp rules for predicate type, simplify primitive proofs
haftmann
parents: 39302
diff changeset
   516
  by (simp add: single_def)
c5ee1e06d795 eval simp rules for predicate type, simplify primitive proofs
haftmann
parents: 39302
diff changeset
   517
c5ee1e06d795 eval simp rules for predicate type, simplify primitive proofs
haftmann
parents: 39302
diff changeset
   518
definition bind :: "'a pred \<Rightarrow> ('a \<Rightarrow> 'b pred) \<Rightarrow> 'b pred" (infixl "\<guillemotright>=" 70) where
41080
294956ff285b nice syntax for lattice INFI, SUPR;
haftmann
parents: 41075
diff changeset
   519
  "P \<guillemotright>= f = (SUPR {x. eval P x} f)"
40616
c5ee1e06d795 eval simp rules for predicate type, simplify primitive proofs
haftmann
parents: 39302
diff changeset
   520
c5ee1e06d795 eval simp rules for predicate type, simplify primitive proofs
haftmann
parents: 39302
diff changeset
   521
lemma eval_bind [simp]:
41080
294956ff285b nice syntax for lattice INFI, SUPR;
haftmann
parents: 41075
diff changeset
   522
  "eval (P \<guillemotright>= f) = eval (SUPR {x. eval P x} f)"
40616
c5ee1e06d795 eval simp rules for predicate type, simplify primitive proofs
haftmann
parents: 39302
diff changeset
   523
  by (simp add: bind_def)
c5ee1e06d795 eval simp rules for predicate type, simplify primitive proofs
haftmann
parents: 39302
diff changeset
   524
30328
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   525
lemma bind_bind:
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   526
  "(P \<guillemotright>= Q) \<guillemotright>= R = P \<guillemotright>= (\<lambda>x. Q x \<guillemotright>= R)"
40674
54dbe6a1c349 adhere established Collect/mem convention more closely
haftmann
parents: 40616
diff changeset
   527
  by (rule pred_eqI) auto
30328
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   528
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   529
lemma bind_single:
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   530
  "P \<guillemotright>= single = P"
40616
c5ee1e06d795 eval simp rules for predicate type, simplify primitive proofs
haftmann
parents: 39302
diff changeset
   531
  by (rule pred_eqI) auto
30328
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   532
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   533
lemma single_bind:
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   534
  "single x \<guillemotright>= P = P x"
40616
c5ee1e06d795 eval simp rules for predicate type, simplify primitive proofs
haftmann
parents: 39302
diff changeset
   535
  by (rule pred_eqI) auto
30328
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   536
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   537
lemma bottom_bind:
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   538
  "\<bottom> \<guillemotright>= P = \<bottom>"
40674
54dbe6a1c349 adhere established Collect/mem convention more closely
haftmann
parents: 40616
diff changeset
   539
  by (rule pred_eqI) auto
30328
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   540
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   541
lemma sup_bind:
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   542
  "(P \<squnion> Q) \<guillemotright>= R = P \<guillemotright>= R \<squnion> Q \<guillemotright>= R"
40674
54dbe6a1c349 adhere established Collect/mem convention more closely
haftmann
parents: 40616
diff changeset
   543
  by (rule pred_eqI) auto
30328
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   544
40616
c5ee1e06d795 eval simp rules for predicate type, simplify primitive proofs
haftmann
parents: 39302
diff changeset
   545
lemma Sup_bind:
c5ee1e06d795 eval simp rules for predicate type, simplify primitive proofs
haftmann
parents: 39302
diff changeset
   546
  "(\<Squnion>A \<guillemotright>= f) = \<Squnion>((\<lambda>x. x \<guillemotright>= f) ` A)"
40674
54dbe6a1c349 adhere established Collect/mem convention more closely
haftmann
parents: 40616
diff changeset
   547
  by (rule pred_eqI) auto
30328
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   548
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   549
lemma pred_iffI:
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   550
  assumes "\<And>x. eval A x \<Longrightarrow> eval B x"
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   551
  and "\<And>x. eval B x \<Longrightarrow> eval A x"
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   552
  shows "A = B"
40616
c5ee1e06d795 eval simp rules for predicate type, simplify primitive proofs
haftmann
parents: 39302
diff changeset
   553
  using assms by (auto intro: pred_eqI)
30328
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   554
  
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   555
lemma singleI: "eval (single x) x"
40616
c5ee1e06d795 eval simp rules for predicate type, simplify primitive proofs
haftmann
parents: 39302
diff changeset
   556
  by simp
30328
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   557
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   558
lemma singleI_unit: "eval (single ()) x"
40616
c5ee1e06d795 eval simp rules for predicate type, simplify primitive proofs
haftmann
parents: 39302
diff changeset
   559
  by simp
30328
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   560
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   561
lemma singleE: "eval (single x) y \<Longrightarrow> (y = x \<Longrightarrow> P) \<Longrightarrow> P"
40616
c5ee1e06d795 eval simp rules for predicate type, simplify primitive proofs
haftmann
parents: 39302
diff changeset
   562
  by simp
30328
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   563
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   564
lemma singleE': "eval (single x) y \<Longrightarrow> (x = y \<Longrightarrow> P) \<Longrightarrow> P"
40616
c5ee1e06d795 eval simp rules for predicate type, simplify primitive proofs
haftmann
parents: 39302
diff changeset
   565
  by simp
30328
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   566
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   567
lemma bindI: "eval P x \<Longrightarrow> eval (Q x) y \<Longrightarrow> eval (P \<guillemotright>= Q) y"
40616
c5ee1e06d795 eval simp rules for predicate type, simplify primitive proofs
haftmann
parents: 39302
diff changeset
   568
  by auto
30328
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   569
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   570
lemma bindE: "eval (R \<guillemotright>= Q) y \<Longrightarrow> (\<And>x. eval R x \<Longrightarrow> eval (Q x) y \<Longrightarrow> P) \<Longrightarrow> P"
40616
c5ee1e06d795 eval simp rules for predicate type, simplify primitive proofs
haftmann
parents: 39302
diff changeset
   571
  by auto
30328
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   572
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   573
lemma botE: "eval \<bottom> x \<Longrightarrow> P"
40616
c5ee1e06d795 eval simp rules for predicate type, simplify primitive proofs
haftmann
parents: 39302
diff changeset
   574
  by auto
30328
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   575
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   576
lemma supI1: "eval A x \<Longrightarrow> eval (A \<squnion> B) x"
40616
c5ee1e06d795 eval simp rules for predicate type, simplify primitive proofs
haftmann
parents: 39302
diff changeset
   577
  by auto
30328
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   578
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   579
lemma supI2: "eval B x \<Longrightarrow> eval (A \<squnion> B) x" 
40616
c5ee1e06d795 eval simp rules for predicate type, simplify primitive proofs
haftmann
parents: 39302
diff changeset
   580
  by auto
30328
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   581
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   582
lemma supE: "eval (A \<squnion> B) x \<Longrightarrow> (eval A x \<Longrightarrow> P) \<Longrightarrow> (eval B x \<Longrightarrow> P) \<Longrightarrow> P"
40616
c5ee1e06d795 eval simp rules for predicate type, simplify primitive proofs
haftmann
parents: 39302
diff changeset
   583
  by auto
30328
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   584
32578
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   585
lemma single_not_bot [simp]:
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   586
  "single x \<noteq> \<bottom>"
39302
d7728f65b353 renamed lemmas: ext_iff -> fun_eq_iff, set_ext_iff -> set_eq_iff, set_ext -> set_eqI
nipkow
parents: 39198
diff changeset
   587
  by (auto simp add: single_def bot_pred_def fun_eq_iff)
32578
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   588
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   589
lemma not_bot:
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   590
  assumes "A \<noteq> \<bottom>"
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   591
  obtains x where "eval A x"
40616
c5ee1e06d795 eval simp rules for predicate type, simplify primitive proofs
haftmann
parents: 39302
diff changeset
   592
  using assms by (cases A)
c5ee1e06d795 eval simp rules for predicate type, simplify primitive proofs
haftmann
parents: 39302
diff changeset
   593
    (auto simp add: bot_pred_def, auto simp add: mem_def)
32578
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   594
  
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   595
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   596
subsubsection {* Emptiness check and definite choice *}
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   597
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   598
definition is_empty :: "'a pred \<Rightarrow> bool" where
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   599
  "is_empty A \<longleftrightarrow> A = \<bottom>"
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   600
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   601
lemma is_empty_bot:
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   602
  "is_empty \<bottom>"
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   603
  by (simp add: is_empty_def)
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   604
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   605
lemma not_is_empty_single:
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   606
  "\<not> is_empty (single x)"
39302
d7728f65b353 renamed lemmas: ext_iff -> fun_eq_iff, set_ext_iff -> set_eq_iff, set_ext -> set_eqI
nipkow
parents: 39198
diff changeset
   607
  by (auto simp add: is_empty_def single_def bot_pred_def fun_eq_iff)
32578
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   608
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   609
lemma is_empty_sup:
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   610
  "is_empty (A \<squnion> B) \<longleftrightarrow> is_empty A \<and> is_empty B"
36008
23dfa8678c7c add/change some lemmas about lattices
huffman
parents: 34065
diff changeset
   611
  by (auto simp add: is_empty_def)
32578
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   612
40616
c5ee1e06d795 eval simp rules for predicate type, simplify primitive proofs
haftmann
parents: 39302
diff changeset
   613
definition singleton :: "(unit \<Rightarrow> 'a) \<Rightarrow> 'a pred \<Rightarrow> 'a" where
33111
db5af7b86a2f developing an executable the operator
bulwahn
parents: 33110
diff changeset
   614
  "singleton dfault A = (if \<exists>!x. eval A x then THE x. eval A x else dfault ())"
32578
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   615
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   616
lemma singleton_eqI:
33110
16f2814653ed generalizing singleton with a default value
bulwahn
parents: 33104
diff changeset
   617
  "\<exists>!x. eval A x \<Longrightarrow> eval A x \<Longrightarrow> singleton dfault A = x"
32578
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   618
  by (auto simp add: singleton_def)
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   619
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   620
lemma eval_singletonI:
33110
16f2814653ed generalizing singleton with a default value
bulwahn
parents: 33104
diff changeset
   621
  "\<exists>!x. eval A x \<Longrightarrow> eval A (singleton dfault A)"
32578
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   622
proof -
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   623
  assume assm: "\<exists>!x. eval A x"
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   624
  then obtain x where "eval A x" ..
33110
16f2814653ed generalizing singleton with a default value
bulwahn
parents: 33104
diff changeset
   625
  moreover with assm have "singleton dfault A = x" by (rule singleton_eqI)
32578
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   626
  ultimately show ?thesis by simp 
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   627
qed
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   628
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   629
lemma single_singleton:
33110
16f2814653ed generalizing singleton with a default value
bulwahn
parents: 33104
diff changeset
   630
  "\<exists>!x. eval A x \<Longrightarrow> single (singleton dfault A) = A"
32578
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   631
proof -
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   632
  assume assm: "\<exists>!x. eval A x"
33110
16f2814653ed generalizing singleton with a default value
bulwahn
parents: 33104
diff changeset
   633
  then have "eval A (singleton dfault A)"
32578
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   634
    by (rule eval_singletonI)
33110
16f2814653ed generalizing singleton with a default value
bulwahn
parents: 33104
diff changeset
   635
  moreover from assm have "\<And>x. eval A x \<Longrightarrow> singleton dfault A = x"
32578
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   636
    by (rule singleton_eqI)
33110
16f2814653ed generalizing singleton with a default value
bulwahn
parents: 33104
diff changeset
   637
  ultimately have "eval (single (singleton dfault A)) = eval A"
39302
d7728f65b353 renamed lemmas: ext_iff -> fun_eq_iff, set_ext_iff -> set_eq_iff, set_ext -> set_eqI
nipkow
parents: 39198
diff changeset
   638
    by (simp (no_asm_use) add: single_def fun_eq_iff) blast
40616
c5ee1e06d795 eval simp rules for predicate type, simplify primitive proofs
haftmann
parents: 39302
diff changeset
   639
  then have "\<And>x. eval (single (singleton dfault A)) x = eval A x"
c5ee1e06d795 eval simp rules for predicate type, simplify primitive proofs
haftmann
parents: 39302
diff changeset
   640
    by simp
c5ee1e06d795 eval simp rules for predicate type, simplify primitive proofs
haftmann
parents: 39302
diff changeset
   641
  then show ?thesis by (rule pred_eqI)
32578
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   642
qed
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   643
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   644
lemma singleton_undefinedI:
33111
db5af7b86a2f developing an executable the operator
bulwahn
parents: 33110
diff changeset
   645
  "\<not> (\<exists>!x. eval A x) \<Longrightarrow> singleton dfault A = dfault ()"
32578
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   646
  by (simp add: singleton_def)
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   647
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   648
lemma singleton_bot:
33111
db5af7b86a2f developing an executable the operator
bulwahn
parents: 33110
diff changeset
   649
  "singleton dfault \<bottom> = dfault ()"
32578
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   650
  by (auto simp add: bot_pred_def intro: singleton_undefinedI)
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   651
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   652
lemma singleton_single:
33110
16f2814653ed generalizing singleton with a default value
bulwahn
parents: 33104
diff changeset
   653
  "singleton dfault (single x) = x"
32578
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   654
  by (auto simp add: intro: singleton_eqI singleI elim: singleE)
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   655
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   656
lemma singleton_sup_single_single:
33111
db5af7b86a2f developing an executable the operator
bulwahn
parents: 33110
diff changeset
   657
  "singleton dfault (single x \<squnion> single y) = (if x = y then x else dfault ())"
32578
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   658
proof (cases "x = y")
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   659
  case True then show ?thesis by (simp add: singleton_single)
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   660
next
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   661
  case False
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   662
  have "eval (single x \<squnion> single y) x"
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   663
    and "eval (single x \<squnion> single y) y"
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   664
  by (auto intro: supI1 supI2 singleI)
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   665
  with False have "\<not> (\<exists>!z. eval (single x \<squnion> single y) z)"
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   666
    by blast
33111
db5af7b86a2f developing an executable the operator
bulwahn
parents: 33110
diff changeset
   667
  then have "singleton dfault (single x \<squnion> single y) = dfault ()"
32578
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   668
    by (rule singleton_undefinedI)
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   669
  with False show ?thesis by simp
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   670
qed
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   671
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   672
lemma singleton_sup_aux:
33110
16f2814653ed generalizing singleton with a default value
bulwahn
parents: 33104
diff changeset
   673
  "singleton dfault (A \<squnion> B) = (if A = \<bottom> then singleton dfault B
16f2814653ed generalizing singleton with a default value
bulwahn
parents: 33104
diff changeset
   674
    else if B = \<bottom> then singleton dfault A
16f2814653ed generalizing singleton with a default value
bulwahn
parents: 33104
diff changeset
   675
    else singleton dfault
16f2814653ed generalizing singleton with a default value
bulwahn
parents: 33104
diff changeset
   676
      (single (singleton dfault A) \<squnion> single (singleton dfault B)))"
32578
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   677
proof (cases "(\<exists>!x. eval A x) \<and> (\<exists>!y. eval B y)")
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   678
  case True then show ?thesis by (simp add: single_singleton)
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   679
next
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   680
  case False
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   681
  from False have A_or_B:
33111
db5af7b86a2f developing an executable the operator
bulwahn
parents: 33110
diff changeset
   682
    "singleton dfault A = dfault () \<or> singleton dfault B = dfault ()"
32578
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   683
    by (auto intro!: singleton_undefinedI)
33110
16f2814653ed generalizing singleton with a default value
bulwahn
parents: 33104
diff changeset
   684
  then have rhs: "singleton dfault
33111
db5af7b86a2f developing an executable the operator
bulwahn
parents: 33110
diff changeset
   685
    (single (singleton dfault A) \<squnion> single (singleton dfault B)) = dfault ()"
32578
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   686
    by (auto simp add: singleton_sup_single_single singleton_single)
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   687
  from False have not_unique:
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   688
    "\<not> (\<exists>!x. eval A x) \<or> \<not> (\<exists>!y. eval B y)" by simp
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   689
  show ?thesis proof (cases "A \<noteq> \<bottom> \<and> B \<noteq> \<bottom>")
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   690
    case True
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   691
    then obtain a b where a: "eval A a" and b: "eval B b"
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   692
      by (blast elim: not_bot)
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   693
    with True not_unique have "\<not> (\<exists>!x. eval (A \<squnion> B) x)"
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   694
      by (auto simp add: sup_pred_def bot_pred_def)
33111
db5af7b86a2f developing an executable the operator
bulwahn
parents: 33110
diff changeset
   695
    then have "singleton dfault (A \<squnion> B) = dfault ()" by (rule singleton_undefinedI)
32578
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   696
    with True rhs show ?thesis by simp
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   697
  next
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   698
    case False then show ?thesis by auto
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   699
  qed
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   700
qed
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   701
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   702
lemma singleton_sup:
33110
16f2814653ed generalizing singleton with a default value
bulwahn
parents: 33104
diff changeset
   703
  "singleton dfault (A \<squnion> B) = (if A = \<bottom> then singleton dfault B
16f2814653ed generalizing singleton with a default value
bulwahn
parents: 33104
diff changeset
   704
    else if B = \<bottom> then singleton dfault A
33111
db5af7b86a2f developing an executable the operator
bulwahn
parents: 33110
diff changeset
   705
    else if singleton dfault A = singleton dfault B then singleton dfault A else dfault ())"
33110
16f2814653ed generalizing singleton with a default value
bulwahn
parents: 33104
diff changeset
   706
using singleton_sup_aux [of dfault A B] by (simp only: singleton_sup_single_single)
32578
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   707
30328
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   708
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   709
subsubsection {* Derived operations *}
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   710
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   711
definition if_pred :: "bool \<Rightarrow> unit pred" where
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   712
  if_pred_eq: "if_pred b = (if b then single () else \<bottom>)"
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   713
33754
f2957bd46faf adding derived constant Predicate.holds to Predicate theory; adopting the predicate compiler
bulwahn
parents: 33622
diff changeset
   714
definition holds :: "unit pred \<Rightarrow> bool" where
f2957bd46faf adding derived constant Predicate.holds to Predicate theory; adopting the predicate compiler
bulwahn
parents: 33622
diff changeset
   715
  holds_eq: "holds P = eval P ()"
f2957bd46faf adding derived constant Predicate.holds to Predicate theory; adopting the predicate compiler
bulwahn
parents: 33622
diff changeset
   716
30328
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   717
definition not_pred :: "unit pred \<Rightarrow> unit pred" where
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   718
  not_pred_eq: "not_pred P = (if eval P () then \<bottom> else single ())"
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   719
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   720
lemma if_predI: "P \<Longrightarrow> eval (if_pred P) ()"
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   721
  unfolding if_pred_eq by (auto intro: singleI)
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   722
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   723
lemma if_predE: "eval (if_pred b) x \<Longrightarrow> (b \<Longrightarrow> x = () \<Longrightarrow> P) \<Longrightarrow> P"
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   724
  unfolding if_pred_eq by (cases b) (auto elim: botE)
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   725
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   726
lemma not_predI: "\<not> P \<Longrightarrow> eval (not_pred (Pred (\<lambda>u. P))) ()"
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   727
  unfolding not_pred_eq eval_pred by (auto intro: singleI)
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   728
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   729
lemma not_predI': "\<not> eval P () \<Longrightarrow> eval (not_pred P) ()"
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   730
  unfolding not_pred_eq by (auto intro: singleI)
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   731
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   732
lemma not_predE: "eval (not_pred (Pred (\<lambda>u. P))) x \<Longrightarrow> (\<not> P \<Longrightarrow> thesis) \<Longrightarrow> thesis"
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   733
  unfolding not_pred_eq
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   734
  by (auto split: split_if_asm elim: botE)
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   735
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   736
lemma not_predE': "eval (not_pred P) x \<Longrightarrow> (\<not> eval P x \<Longrightarrow> thesis) \<Longrightarrow> thesis"
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   737
  unfolding not_pred_eq
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   738
  by (auto split: split_if_asm elim: botE)
33754
f2957bd46faf adding derived constant Predicate.holds to Predicate theory; adopting the predicate compiler
bulwahn
parents: 33622
diff changeset
   739
lemma "f () = False \<or> f () = True"
f2957bd46faf adding derived constant Predicate.holds to Predicate theory; adopting the predicate compiler
bulwahn
parents: 33622
diff changeset
   740
by simp
30328
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   741
37549
a62f742f1d58 yields ill-typed ATP/metis proofs -- raus!
blanchet
parents: 36531
diff changeset
   742
lemma closure_of_bool_cases [no_atp]:
44007
b5e7594061ce tuned proofs
haftmann
parents: 41550
diff changeset
   743
  fixes f :: "unit \<Rightarrow> bool"
b5e7594061ce tuned proofs
haftmann
parents: 41550
diff changeset
   744
  assumes "f = (\<lambda>u. False) \<Longrightarrow> P f"
b5e7594061ce tuned proofs
haftmann
parents: 41550
diff changeset
   745
  assumes "f = (\<lambda>u. True) \<Longrightarrow> P f"
b5e7594061ce tuned proofs
haftmann
parents: 41550
diff changeset
   746
  shows "P f"
33754
f2957bd46faf adding derived constant Predicate.holds to Predicate theory; adopting the predicate compiler
bulwahn
parents: 33622
diff changeset
   747
proof -
44007
b5e7594061ce tuned proofs
haftmann
parents: 41550
diff changeset
   748
  have "f = (\<lambda>u. False) \<or> f = (\<lambda>u. True)"
33754
f2957bd46faf adding derived constant Predicate.holds to Predicate theory; adopting the predicate compiler
bulwahn
parents: 33622
diff changeset
   749
    apply (cases "f ()")
f2957bd46faf adding derived constant Predicate.holds to Predicate theory; adopting the predicate compiler
bulwahn
parents: 33622
diff changeset
   750
    apply (rule disjI2)
f2957bd46faf adding derived constant Predicate.holds to Predicate theory; adopting the predicate compiler
bulwahn
parents: 33622
diff changeset
   751
    apply (rule ext)
f2957bd46faf adding derived constant Predicate.holds to Predicate theory; adopting the predicate compiler
bulwahn
parents: 33622
diff changeset
   752
    apply (simp add: unit_eq)
f2957bd46faf adding derived constant Predicate.holds to Predicate theory; adopting the predicate compiler
bulwahn
parents: 33622
diff changeset
   753
    apply (rule disjI1)
f2957bd46faf adding derived constant Predicate.holds to Predicate theory; adopting the predicate compiler
bulwahn
parents: 33622
diff changeset
   754
    apply (rule ext)
f2957bd46faf adding derived constant Predicate.holds to Predicate theory; adopting the predicate compiler
bulwahn
parents: 33622
diff changeset
   755
    apply (simp add: unit_eq)
f2957bd46faf adding derived constant Predicate.holds to Predicate theory; adopting the predicate compiler
bulwahn
parents: 33622
diff changeset
   756
    done
41550
efa734d9b221 eliminated global prems;
wenzelm
parents: 41505
diff changeset
   757
  from this assms show ?thesis by blast
33754
f2957bd46faf adding derived constant Predicate.holds to Predicate theory; adopting the predicate compiler
bulwahn
parents: 33622
diff changeset
   758
qed
f2957bd46faf adding derived constant Predicate.holds to Predicate theory; adopting the predicate compiler
bulwahn
parents: 33622
diff changeset
   759
f2957bd46faf adding derived constant Predicate.holds to Predicate theory; adopting the predicate compiler
bulwahn
parents: 33622
diff changeset
   760
lemma unit_pred_cases:
44007
b5e7594061ce tuned proofs
haftmann
parents: 41550
diff changeset
   761
  assumes "P \<bottom>"
b5e7594061ce tuned proofs
haftmann
parents: 41550
diff changeset
   762
  assumes "P (single ())"
b5e7594061ce tuned proofs
haftmann
parents: 41550
diff changeset
   763
  shows "P Q"
b5e7594061ce tuned proofs
haftmann
parents: 41550
diff changeset
   764
using assms unfolding bot_pred_def Collect_def empty_def single_def proof (cases Q)
b5e7594061ce tuned proofs
haftmann
parents: 41550
diff changeset
   765
  fix f
b5e7594061ce tuned proofs
haftmann
parents: 41550
diff changeset
   766
  assume "P (Pred (\<lambda>u. False))" "P (Pred (\<lambda>u. () = u))"
b5e7594061ce tuned proofs
haftmann
parents: 41550
diff changeset
   767
  then have "P (Pred f)" 
b5e7594061ce tuned proofs
haftmann
parents: 41550
diff changeset
   768
    by (cases _ f rule: closure_of_bool_cases) simp_all
b5e7594061ce tuned proofs
haftmann
parents: 41550
diff changeset
   769
  moreover assume "Q = Pred f"
b5e7594061ce tuned proofs
haftmann
parents: 41550
diff changeset
   770
  ultimately show "P Q" by simp
b5e7594061ce tuned proofs
haftmann
parents: 41550
diff changeset
   771
qed
b5e7594061ce tuned proofs
haftmann
parents: 41550
diff changeset
   772
  
33754
f2957bd46faf adding derived constant Predicate.holds to Predicate theory; adopting the predicate compiler
bulwahn
parents: 33622
diff changeset
   773
lemma holds_if_pred:
f2957bd46faf adding derived constant Predicate.holds to Predicate theory; adopting the predicate compiler
bulwahn
parents: 33622
diff changeset
   774
  "holds (if_pred b) = b"
f2957bd46faf adding derived constant Predicate.holds to Predicate theory; adopting the predicate compiler
bulwahn
parents: 33622
diff changeset
   775
unfolding if_pred_eq holds_eq
f2957bd46faf adding derived constant Predicate.holds to Predicate theory; adopting the predicate compiler
bulwahn
parents: 33622
diff changeset
   776
by (cases b) (auto intro: singleI elim: botE)
f2957bd46faf adding derived constant Predicate.holds to Predicate theory; adopting the predicate compiler
bulwahn
parents: 33622
diff changeset
   777
f2957bd46faf adding derived constant Predicate.holds to Predicate theory; adopting the predicate compiler
bulwahn
parents: 33622
diff changeset
   778
lemma if_pred_holds:
f2957bd46faf adding derived constant Predicate.holds to Predicate theory; adopting the predicate compiler
bulwahn
parents: 33622
diff changeset
   779
  "if_pred (holds P) = P"
f2957bd46faf adding derived constant Predicate.holds to Predicate theory; adopting the predicate compiler
bulwahn
parents: 33622
diff changeset
   780
unfolding if_pred_eq holds_eq
f2957bd46faf adding derived constant Predicate.holds to Predicate theory; adopting the predicate compiler
bulwahn
parents: 33622
diff changeset
   781
by (rule unit_pred_cases) (auto intro: singleI elim: botE)
f2957bd46faf adding derived constant Predicate.holds to Predicate theory; adopting the predicate compiler
bulwahn
parents: 33622
diff changeset
   782
f2957bd46faf adding derived constant Predicate.holds to Predicate theory; adopting the predicate compiler
bulwahn
parents: 33622
diff changeset
   783
lemma is_empty_holds:
f2957bd46faf adding derived constant Predicate.holds to Predicate theory; adopting the predicate compiler
bulwahn
parents: 33622
diff changeset
   784
  "is_empty P \<longleftrightarrow> \<not> holds P"
f2957bd46faf adding derived constant Predicate.holds to Predicate theory; adopting the predicate compiler
bulwahn
parents: 33622
diff changeset
   785
unfolding is_empty_def holds_eq
f2957bd46faf adding derived constant Predicate.holds to Predicate theory; adopting the predicate compiler
bulwahn
parents: 33622
diff changeset
   786
by (rule unit_pred_cases) (auto elim: botE intro: singleI)
30328
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   787
41311
de0c906dfe60 type_lifting for predicates
haftmann
parents: 41082
diff changeset
   788
definition map :: "('a \<Rightarrow> 'b) \<Rightarrow> 'a pred \<Rightarrow> 'b pred" where
de0c906dfe60 type_lifting for predicates
haftmann
parents: 41082
diff changeset
   789
  "map f P = P \<guillemotright>= (single o f)"
de0c906dfe60 type_lifting for predicates
haftmann
parents: 41082
diff changeset
   790
de0c906dfe60 type_lifting for predicates
haftmann
parents: 41082
diff changeset
   791
lemma eval_map [simp]:
44363
53f4f8287606 avoid pred/set mixture
haftmann
parents: 44033
diff changeset
   792
  "eval (map f P) = (\<Squnion>x\<in>{x. eval P x}. (\<lambda>y. f x = y))"
41311
de0c906dfe60 type_lifting for predicates
haftmann
parents: 41082
diff changeset
   793
  by (auto simp add: map_def)
de0c906dfe60 type_lifting for predicates
haftmann
parents: 41082
diff changeset
   794
41505
6d19301074cf "enriched_type" replaces less specific "type_lifting"
haftmann
parents: 41372
diff changeset
   795
enriched_type map: map
44363
53f4f8287606 avoid pred/set mixture
haftmann
parents: 44033
diff changeset
   796
  by (rule ext, rule pred_eqI, auto)+
41311
de0c906dfe60 type_lifting for predicates
haftmann
parents: 41082
diff changeset
   797
de0c906dfe60 type_lifting for predicates
haftmann
parents: 41082
diff changeset
   798
30328
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   799
subsubsection {* Implementation *}
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   800
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   801
datatype 'a seq = Empty | Insert "'a" "'a pred" | Join "'a pred" "'a seq"
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   802
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   803
primrec pred_of_seq :: "'a seq \<Rightarrow> 'a pred" where
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   804
    "pred_of_seq Empty = \<bottom>"
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   805
  | "pred_of_seq (Insert x P) = single x \<squnion> P"
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   806
  | "pred_of_seq (Join P xq) = P \<squnion> pred_of_seq xq"
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   807
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   808
definition Seq :: "(unit \<Rightarrow> 'a seq) \<Rightarrow> 'a pred" where
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   809
  "Seq f = pred_of_seq (f ())"
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   810
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   811
code_datatype Seq
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   812
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   813
primrec member :: "'a seq \<Rightarrow> 'a \<Rightarrow> bool"  where
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   814
  "member Empty x \<longleftrightarrow> False"
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   815
  | "member (Insert y P) x \<longleftrightarrow> x = y \<or> eval P x"
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   816
  | "member (Join P xq) x \<longleftrightarrow> eval P x \<or> member xq x"
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   817
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   818
lemma eval_member:
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   819
  "member xq = eval (pred_of_seq xq)"
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   820
proof (induct xq)
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   821
  case Empty show ?case
39302
d7728f65b353 renamed lemmas: ext_iff -> fun_eq_iff, set_ext_iff -> set_eq_iff, set_ext -> set_eqI
nipkow
parents: 39198
diff changeset
   822
  by (auto simp add: fun_eq_iff elim: botE)
30328
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   823
next
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   824
  case Insert show ?case
39302
d7728f65b353 renamed lemmas: ext_iff -> fun_eq_iff, set_ext_iff -> set_eq_iff, set_ext -> set_eqI
nipkow
parents: 39198
diff changeset
   825
  by (auto simp add: fun_eq_iff elim: supE singleE intro: supI1 supI2 singleI)
30328
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   826
next
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   827
  case Join then show ?case
39302
d7728f65b353 renamed lemmas: ext_iff -> fun_eq_iff, set_ext_iff -> set_eq_iff, set_ext -> set_eqI
nipkow
parents: 39198
diff changeset
   828
  by (auto simp add: fun_eq_iff elim: supE intro: supI1 supI2)
30328
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   829
qed
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   830
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   831
lemma eval_code [code]: "eval (Seq f) = member (f ())"
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   832
  unfolding Seq_def by (rule sym, rule eval_member)
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   833
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   834
lemma single_code [code]:
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   835
  "single x = Seq (\<lambda>u. Insert x \<bottom>)"
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   836
  unfolding Seq_def by simp
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   837
41080
294956ff285b nice syntax for lattice INFI, SUPR;
haftmann
parents: 41075
diff changeset
   838
primrec "apply" :: "('a \<Rightarrow> 'b pred) \<Rightarrow> 'a seq \<Rightarrow> 'b seq" where
30328
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   839
    "apply f Empty = Empty"
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   840
  | "apply f (Insert x P) = Join (f x) (Join (P \<guillemotright>= f) Empty)"
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   841
  | "apply f (Join P xq) = Join (P \<guillemotright>= f) (apply f xq)"
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   842
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   843
lemma apply_bind:
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   844
  "pred_of_seq (apply f xq) = pred_of_seq xq \<guillemotright>= f"
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   845
proof (induct xq)
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   846
  case Empty show ?case
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   847
    by (simp add: bottom_bind)
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   848
next
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   849
  case Insert show ?case
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   850
    by (simp add: single_bind sup_bind)
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   851
next
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   852
  case Join then show ?case
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   853
    by (simp add: sup_bind)
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   854
qed
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   855
  
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   856
lemma bind_code [code]:
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   857
  "Seq g \<guillemotright>= f = Seq (\<lambda>u. apply f (g ()))"
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   858
  unfolding Seq_def by (rule sym, rule apply_bind)
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   859
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   860
lemma bot_set_code [code]:
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   861
  "\<bottom> = Seq (\<lambda>u. Empty)"
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   862
  unfolding Seq_def by simp
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   863
30376
e8cc806a3755 refined enumeration implementation
haftmann
parents: 30328
diff changeset
   864
primrec adjunct :: "'a pred \<Rightarrow> 'a seq \<Rightarrow> 'a seq" where
e8cc806a3755 refined enumeration implementation
haftmann
parents: 30328
diff changeset
   865
    "adjunct P Empty = Join P Empty"
e8cc806a3755 refined enumeration implementation
haftmann
parents: 30328
diff changeset
   866
  | "adjunct P (Insert x Q) = Insert x (Q \<squnion> P)"
e8cc806a3755 refined enumeration implementation
haftmann
parents: 30328
diff changeset
   867
  | "adjunct P (Join Q xq) = Join Q (adjunct P xq)"
e8cc806a3755 refined enumeration implementation
haftmann
parents: 30328
diff changeset
   868
e8cc806a3755 refined enumeration implementation
haftmann
parents: 30328
diff changeset
   869
lemma adjunct_sup:
e8cc806a3755 refined enumeration implementation
haftmann
parents: 30328
diff changeset
   870
  "pred_of_seq (adjunct P xq) = P \<squnion> pred_of_seq xq"
e8cc806a3755 refined enumeration implementation
haftmann
parents: 30328
diff changeset
   871
  by (induct xq) (simp_all add: sup_assoc sup_commute sup_left_commute)
e8cc806a3755 refined enumeration implementation
haftmann
parents: 30328
diff changeset
   872
30328
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   873
lemma sup_code [code]:
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   874
  "Seq f \<squnion> Seq g = Seq (\<lambda>u. case f ()
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   875
    of Empty \<Rightarrow> g ()
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   876
     | Insert x P \<Rightarrow> Insert x (P \<squnion> Seq g)
30376
e8cc806a3755 refined enumeration implementation
haftmann
parents: 30328
diff changeset
   877
     | Join P xq \<Rightarrow> adjunct (Seq g) (Join P xq))"
30328
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   878
proof (cases "f ()")
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   879
  case Empty
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   880
  thus ?thesis
34007
aea892559fc5 tuned lattices theory fragements; generlized some lemmas from sets to lattices
haftmann
parents: 33988
diff changeset
   881
    unfolding Seq_def by (simp add: sup_commute [of "\<bottom>"])
30328
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   882
next
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   883
  case Insert
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   884
  thus ?thesis
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   885
    unfolding Seq_def by (simp add: sup_assoc)
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   886
next
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   887
  case Join
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   888
  thus ?thesis
30376
e8cc806a3755 refined enumeration implementation
haftmann
parents: 30328
diff changeset
   889
    unfolding Seq_def
e8cc806a3755 refined enumeration implementation
haftmann
parents: 30328
diff changeset
   890
    by (simp add: adjunct_sup sup_assoc sup_commute sup_left_commute)
30328
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   891
qed
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   892
30430
42ea5d85edcc explicit code equations for some rarely used pred operations
haftmann
parents: 30378
diff changeset
   893
primrec contained :: "'a seq \<Rightarrow> 'a pred \<Rightarrow> bool" where
42ea5d85edcc explicit code equations for some rarely used pred operations
haftmann
parents: 30378
diff changeset
   894
    "contained Empty Q \<longleftrightarrow> True"
42ea5d85edcc explicit code equations for some rarely used pred operations
haftmann
parents: 30378
diff changeset
   895
  | "contained (Insert x P) Q \<longleftrightarrow> eval Q x \<and> P \<le> Q"
42ea5d85edcc explicit code equations for some rarely used pred operations
haftmann
parents: 30378
diff changeset
   896
  | "contained (Join P xq) Q \<longleftrightarrow> P \<le> Q \<and> contained xq Q"
42ea5d85edcc explicit code equations for some rarely used pred operations
haftmann
parents: 30378
diff changeset
   897
42ea5d85edcc explicit code equations for some rarely used pred operations
haftmann
parents: 30378
diff changeset
   898
lemma single_less_eq_eval:
42ea5d85edcc explicit code equations for some rarely used pred operations
haftmann
parents: 30378
diff changeset
   899
  "single x \<le> P \<longleftrightarrow> eval P x"
42ea5d85edcc explicit code equations for some rarely used pred operations
haftmann
parents: 30378
diff changeset
   900
  by (auto simp add: single_def less_eq_pred_def mem_def)
42ea5d85edcc explicit code equations for some rarely used pred operations
haftmann
parents: 30378
diff changeset
   901
42ea5d85edcc explicit code equations for some rarely used pred operations
haftmann
parents: 30378
diff changeset
   902
lemma contained_less_eq:
42ea5d85edcc explicit code equations for some rarely used pred operations
haftmann
parents: 30378
diff changeset
   903
  "contained xq Q \<longleftrightarrow> pred_of_seq xq \<le> Q"
42ea5d85edcc explicit code equations for some rarely used pred operations
haftmann
parents: 30378
diff changeset
   904
  by (induct xq) (simp_all add: single_less_eq_eval)
42ea5d85edcc explicit code equations for some rarely used pred operations
haftmann
parents: 30378
diff changeset
   905
42ea5d85edcc explicit code equations for some rarely used pred operations
haftmann
parents: 30378
diff changeset
   906
lemma less_eq_pred_code [code]:
42ea5d85edcc explicit code equations for some rarely used pred operations
haftmann
parents: 30378
diff changeset
   907
  "Seq f \<le> Q = (case f ()
42ea5d85edcc explicit code equations for some rarely used pred operations
haftmann
parents: 30378
diff changeset
   908
   of Empty \<Rightarrow> True
42ea5d85edcc explicit code equations for some rarely used pred operations
haftmann
parents: 30378
diff changeset
   909
    | Insert x P \<Rightarrow> eval Q x \<and> P \<le> Q
42ea5d85edcc explicit code equations for some rarely used pred operations
haftmann
parents: 30378
diff changeset
   910
    | Join P xq \<Rightarrow> P \<le> Q \<and> contained xq Q)"
42ea5d85edcc explicit code equations for some rarely used pred operations
haftmann
parents: 30378
diff changeset
   911
  by (cases "f ()")
42ea5d85edcc explicit code equations for some rarely used pred operations
haftmann
parents: 30378
diff changeset
   912
    (simp_all add: Seq_def single_less_eq_eval contained_less_eq)
42ea5d85edcc explicit code equations for some rarely used pred operations
haftmann
parents: 30378
diff changeset
   913
42ea5d85edcc explicit code equations for some rarely used pred operations
haftmann
parents: 30378
diff changeset
   914
lemma eq_pred_code [code]:
31133
a9f728dc5c8e dropped sort constraint on predicate equality
haftmann
parents: 31122
diff changeset
   915
  fixes P Q :: "'a pred"
38857
97775f3e8722 renamed class/constant eq to equal; tuned some instantiations
haftmann
parents: 38651
diff changeset
   916
  shows "HOL.equal P Q \<longleftrightarrow> P \<le> Q \<and> Q \<le> P"
97775f3e8722 renamed class/constant eq to equal; tuned some instantiations
haftmann
parents: 38651
diff changeset
   917
  by (auto simp add: equal)
97775f3e8722 renamed class/constant eq to equal; tuned some instantiations
haftmann
parents: 38651
diff changeset
   918
97775f3e8722 renamed class/constant eq to equal; tuned some instantiations
haftmann
parents: 38651
diff changeset
   919
lemma [code nbe]:
97775f3e8722 renamed class/constant eq to equal; tuned some instantiations
haftmann
parents: 38651
diff changeset
   920
  "HOL.equal (x :: 'a pred) x \<longleftrightarrow> True"
97775f3e8722 renamed class/constant eq to equal; tuned some instantiations
haftmann
parents: 38651
diff changeset
   921
  by (fact equal_refl)
30430
42ea5d85edcc explicit code equations for some rarely used pred operations
haftmann
parents: 30378
diff changeset
   922
42ea5d85edcc explicit code equations for some rarely used pred operations
haftmann
parents: 30378
diff changeset
   923
lemma [code]:
42ea5d85edcc explicit code equations for some rarely used pred operations
haftmann
parents: 30378
diff changeset
   924
  "pred_case f P = f (eval P)"
42ea5d85edcc explicit code equations for some rarely used pred operations
haftmann
parents: 30378
diff changeset
   925
  by (cases P) simp
42ea5d85edcc explicit code equations for some rarely used pred operations
haftmann
parents: 30378
diff changeset
   926
42ea5d85edcc explicit code equations for some rarely used pred operations
haftmann
parents: 30378
diff changeset
   927
lemma [code]:
42ea5d85edcc explicit code equations for some rarely used pred operations
haftmann
parents: 30378
diff changeset
   928
  "pred_rec f P = f (eval P)"
42ea5d85edcc explicit code equations for some rarely used pred operations
haftmann
parents: 30378
diff changeset
   929
  by (cases P) simp
30328
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
   930
31105
95f66b234086 added general preprocessing of equality in predicates for code generation
bulwahn
parents: 30430
diff changeset
   931
inductive eq :: "'a \<Rightarrow> 'a \<Rightarrow> bool" where "eq x x"
95f66b234086 added general preprocessing of equality in predicates for code generation
bulwahn
parents: 30430
diff changeset
   932
95f66b234086 added general preprocessing of equality in predicates for code generation
bulwahn
parents: 30430
diff changeset
   933
lemma eq_is_eq: "eq x y \<equiv> (x = y)"
31108
haftmann
parents: 31106 30959
diff changeset
   934
  by (rule eq_reflection) (auto intro: eq.intros elim: eq.cases)
30948
7f699568a877 static compilation of enumeration type
haftmann
parents: 30430
diff changeset
   935
32578
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   936
primrec null :: "'a seq \<Rightarrow> bool" where
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   937
    "null Empty \<longleftrightarrow> True"
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   938
  | "null (Insert x P) \<longleftrightarrow> False"
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   939
  | "null (Join P xq) \<longleftrightarrow> is_empty P \<and> null xq"
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   940
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   941
lemma null_is_empty:
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   942
  "null xq \<longleftrightarrow> is_empty (pred_of_seq xq)"
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   943
  by (induct xq) (simp_all add: is_empty_bot not_is_empty_single is_empty_sup)
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   944
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   945
lemma is_empty_code [code]:
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   946
  "is_empty (Seq f) \<longleftrightarrow> null (f ())"
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   947
  by (simp add: null_is_empty Seq_def)
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   948
33111
db5af7b86a2f developing an executable the operator
bulwahn
parents: 33110
diff changeset
   949
primrec the_only :: "(unit \<Rightarrow> 'a) \<Rightarrow> 'a seq \<Rightarrow> 'a" where
db5af7b86a2f developing an executable the operator
bulwahn
parents: 33110
diff changeset
   950
  [code del]: "the_only dfault Empty = dfault ()"
db5af7b86a2f developing an executable the operator
bulwahn
parents: 33110
diff changeset
   951
  | "the_only dfault (Insert x P) = (if is_empty P then x else let y = singleton dfault P in if x = y then x else dfault ())"
33110
16f2814653ed generalizing singleton with a default value
bulwahn
parents: 33104
diff changeset
   952
  | "the_only dfault (Join P xq) = (if is_empty P then the_only dfault xq else if null xq then singleton dfault P
16f2814653ed generalizing singleton with a default value
bulwahn
parents: 33104
diff changeset
   953
       else let x = singleton dfault P; y = the_only dfault xq in
33111
db5af7b86a2f developing an executable the operator
bulwahn
parents: 33110
diff changeset
   954
       if x = y then x else dfault ())"
32578
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   955
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   956
lemma the_only_singleton:
33110
16f2814653ed generalizing singleton with a default value
bulwahn
parents: 33104
diff changeset
   957
  "the_only dfault xq = singleton dfault (pred_of_seq xq)"
32578
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   958
  by (induct xq)
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   959
    (auto simp add: singleton_bot singleton_single is_empty_def
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   960
    null_is_empty Let_def singleton_sup)
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   961
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   962
lemma singleton_code [code]:
33110
16f2814653ed generalizing singleton with a default value
bulwahn
parents: 33104
diff changeset
   963
  "singleton dfault (Seq f) = (case f ()
33111
db5af7b86a2f developing an executable the operator
bulwahn
parents: 33110
diff changeset
   964
   of Empty \<Rightarrow> dfault ()
32578
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   965
    | Insert x P \<Rightarrow> if is_empty P then x
33110
16f2814653ed generalizing singleton with a default value
bulwahn
parents: 33104
diff changeset
   966
        else let y = singleton dfault P in
33111
db5af7b86a2f developing an executable the operator
bulwahn
parents: 33110
diff changeset
   967
          if x = y then x else dfault ()
33110
16f2814653ed generalizing singleton with a default value
bulwahn
parents: 33104
diff changeset
   968
    | Join P xq \<Rightarrow> if is_empty P then the_only dfault xq
16f2814653ed generalizing singleton with a default value
bulwahn
parents: 33104
diff changeset
   969
        else if null xq then singleton dfault P
16f2814653ed generalizing singleton with a default value
bulwahn
parents: 33104
diff changeset
   970
        else let x = singleton dfault P; y = the_only dfault xq in
33111
db5af7b86a2f developing an executable the operator
bulwahn
parents: 33110
diff changeset
   971
          if x = y then x else dfault ())"
32578
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   972
  by (cases "f ()")
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   973
   (auto simp add: Seq_def the_only_singleton is_empty_def
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   974
      null_is_empty singleton_bot singleton_single singleton_sup Let_def)
22117a76f943 added emptiness check predicate and singleton projection
haftmann
parents: 32372
diff changeset
   975
33110
16f2814653ed generalizing singleton with a default value
bulwahn
parents: 33104
diff changeset
   976
definition not_unique :: "'a pred => 'a"
16f2814653ed generalizing singleton with a default value
bulwahn
parents: 33104
diff changeset
   977
where
33111
db5af7b86a2f developing an executable the operator
bulwahn
parents: 33110
diff changeset
   978
  [code del]: "not_unique A = (THE x. eval A x)"
33110
16f2814653ed generalizing singleton with a default value
bulwahn
parents: 33104
diff changeset
   979
33111
db5af7b86a2f developing an executable the operator
bulwahn
parents: 33110
diff changeset
   980
definition the :: "'a pred => 'a"
db5af7b86a2f developing an executable the operator
bulwahn
parents: 33110
diff changeset
   981
where
37767
a2b7a20d6ea3 dropped superfluous [code del]s
haftmann
parents: 37549
diff changeset
   982
  "the A = (THE x. eval A x)"
33111
db5af7b86a2f developing an executable the operator
bulwahn
parents: 33110
diff changeset
   983
40674
54dbe6a1c349 adhere established Collect/mem convention more closely
haftmann
parents: 40616
diff changeset
   984
lemma the_eqI:
41080
294956ff285b nice syntax for lattice INFI, SUPR;
haftmann
parents: 41075
diff changeset
   985
  "(THE x. eval P x) = x \<Longrightarrow> the P = x"
40674
54dbe6a1c349 adhere established Collect/mem convention more closely
haftmann
parents: 40616
diff changeset
   986
  by (simp add: the_def)
54dbe6a1c349 adhere established Collect/mem convention more closely
haftmann
parents: 40616
diff changeset
   987
54dbe6a1c349 adhere established Collect/mem convention more closely
haftmann
parents: 40616
diff changeset
   988
lemma the_eq [code]: "the A = singleton (\<lambda>x. not_unique A) A"
54dbe6a1c349 adhere established Collect/mem convention more closely
haftmann
parents: 40616
diff changeset
   989
  by (rule the_eqI) (simp add: singleton_def not_unique_def)
33110
16f2814653ed generalizing singleton with a default value
bulwahn
parents: 33104
diff changeset
   990
33988
901001414358 tuned code setup
haftmann
parents: 33754
diff changeset
   991
code_abort not_unique
901001414358 tuned code setup
haftmann
parents: 33754
diff changeset
   992
36531
19f6e3b0d9b6 code_reflect: specify module name directly after keyword
haftmann
parents: 36513
diff changeset
   993
code_reflect Predicate
36513
70096cbdd4e0 avoid code_datatype antiquotation
haftmann
parents: 36176
diff changeset
   994
  datatypes pred = Seq and seq = Empty | Insert | Join
70096cbdd4e0 avoid code_datatype antiquotation
haftmann
parents: 36176
diff changeset
   995
  functions map
70096cbdd4e0 avoid code_datatype antiquotation
haftmann
parents: 36176
diff changeset
   996
30948
7f699568a877 static compilation of enumeration type
haftmann
parents: 30430
diff changeset
   997
ML {*
7f699568a877 static compilation of enumeration type
haftmann
parents: 30430
diff changeset
   998
signature PREDICATE =
7f699568a877 static compilation of enumeration type
haftmann
parents: 30430
diff changeset
   999
sig
7f699568a877 static compilation of enumeration type
haftmann
parents: 30430
diff changeset
  1000
  datatype 'a pred = Seq of (unit -> 'a seq)
7f699568a877 static compilation of enumeration type
haftmann
parents: 30430
diff changeset
  1001
  and 'a seq = Empty | Insert of 'a * 'a pred | Join of 'a pred * 'a seq
30959
458e55fd0a33 fixed compilation of predicate types in ML environment
haftmann
parents: 30948
diff changeset
  1002
  val yield: 'a pred -> ('a * 'a pred) option
458e55fd0a33 fixed compilation of predicate types in ML environment
haftmann
parents: 30948
diff changeset
  1003
  val yieldn: int -> 'a pred -> 'a list * 'a pred
31222
4a84ae57b65f added Predicate.map in SML environment
haftmann
parents: 31216
diff changeset
  1004
  val map: ('a -> 'b) -> 'a pred -> 'b pred
30948
7f699568a877 static compilation of enumeration type
haftmann
parents: 30430
diff changeset
  1005
end;
7f699568a877 static compilation of enumeration type
haftmann
parents: 30430
diff changeset
  1006
7f699568a877 static compilation of enumeration type
haftmann
parents: 30430
diff changeset
  1007
structure Predicate : PREDICATE =
7f699568a877 static compilation of enumeration type
haftmann
parents: 30430
diff changeset
  1008
struct
7f699568a877 static compilation of enumeration type
haftmann
parents: 30430
diff changeset
  1009
36513
70096cbdd4e0 avoid code_datatype antiquotation
haftmann
parents: 36176
diff changeset
  1010
datatype pred = datatype Predicate.pred
70096cbdd4e0 avoid code_datatype antiquotation
haftmann
parents: 36176
diff changeset
  1011
datatype seq = datatype Predicate.seq
70096cbdd4e0 avoid code_datatype antiquotation
haftmann
parents: 36176
diff changeset
  1012
70096cbdd4e0 avoid code_datatype antiquotation
haftmann
parents: 36176
diff changeset
  1013
fun map f = Predicate.map f;
30959
458e55fd0a33 fixed compilation of predicate types in ML environment
haftmann
parents: 30948
diff changeset
  1014
36513
70096cbdd4e0 avoid code_datatype antiquotation
haftmann
parents: 36176
diff changeset
  1015
fun yield (Seq f) = next (f ())
70096cbdd4e0 avoid code_datatype antiquotation
haftmann
parents: 36176
diff changeset
  1016
and next Empty = NONE
70096cbdd4e0 avoid code_datatype antiquotation
haftmann
parents: 36176
diff changeset
  1017
  | next (Insert (x, P)) = SOME (x, P)
70096cbdd4e0 avoid code_datatype antiquotation
haftmann
parents: 36176
diff changeset
  1018
  | next (Join (P, xq)) = (case yield P
30959
458e55fd0a33 fixed compilation of predicate types in ML environment
haftmann
parents: 30948
diff changeset
  1019
     of NONE => next xq
36513
70096cbdd4e0 avoid code_datatype antiquotation
haftmann
parents: 36176
diff changeset
  1020
      | SOME (x, Q) => SOME (x, Seq (fn _ => Join (Q, xq))));
30959
458e55fd0a33 fixed compilation of predicate types in ML environment
haftmann
parents: 30948
diff changeset
  1021
458e55fd0a33 fixed compilation of predicate types in ML environment
haftmann
parents: 30948
diff changeset
  1022
fun anamorph f k x = (if k = 0 then ([], x)
458e55fd0a33 fixed compilation of predicate types in ML environment
haftmann
parents: 30948
diff changeset
  1023
  else case f x
458e55fd0a33 fixed compilation of predicate types in ML environment
haftmann
parents: 30948
diff changeset
  1024
   of NONE => ([], x)
458e55fd0a33 fixed compilation of predicate types in ML environment
haftmann
parents: 30948
diff changeset
  1025
    | SOME (v, y) => let
458e55fd0a33 fixed compilation of predicate types in ML environment
haftmann
parents: 30948
diff changeset
  1026
        val (vs, z) = anamorph f (k - 1) y
33607
haftmann
parents: 33111
diff changeset
  1027
      in (v :: vs, z) end);
30959
458e55fd0a33 fixed compilation of predicate types in ML environment
haftmann
parents: 30948
diff changeset
  1028
458e55fd0a33 fixed compilation of predicate types in ML environment
haftmann
parents: 30948
diff changeset
  1029
fun yieldn P = anamorph yield P;
30948
7f699568a877 static compilation of enumeration type
haftmann
parents: 30430
diff changeset
  1030
7f699568a877 static compilation of enumeration type
haftmann
parents: 30430
diff changeset
  1031
end;
7f699568a877 static compilation of enumeration type
haftmann
parents: 30430
diff changeset
  1032
*}
7f699568a877 static compilation of enumeration type
haftmann
parents: 30430
diff changeset
  1033
44363
53f4f8287606 avoid pred/set mixture
haftmann
parents: 44033
diff changeset
  1034
lemma eval_mem [simp]:
53f4f8287606 avoid pred/set mixture
haftmann
parents: 44033
diff changeset
  1035
  "x \<in> eval P \<longleftrightarrow> eval P x"
53f4f8287606 avoid pred/set mixture
haftmann
parents: 44033
diff changeset
  1036
  by (simp add: mem_def)
53f4f8287606 avoid pred/set mixture
haftmann
parents: 44033
diff changeset
  1037
53f4f8287606 avoid pred/set mixture
haftmann
parents: 44033
diff changeset
  1038
lemma eq_mem [simp]:
53f4f8287606 avoid pred/set mixture
haftmann
parents: 44033
diff changeset
  1039
  "x \<in> (op =) y \<longleftrightarrow> x = y"
53f4f8287606 avoid pred/set mixture
haftmann
parents: 44033
diff changeset
  1040
  by (auto simp add: mem_def)
53f4f8287606 avoid pred/set mixture
haftmann
parents: 44033
diff changeset
  1041
30328
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
  1042
no_notation
41082
9ff94e7cc3b3 bot comes before top, inf before sup etc.
haftmann
parents: 41080
diff changeset
  1043
  bot ("\<bottom>") and
9ff94e7cc3b3 bot comes before top, inf before sup etc.
haftmann
parents: 41080
diff changeset
  1044
  top ("\<top>") and
30328
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
  1045
  inf (infixl "\<sqinter>" 70) and
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
  1046
  sup (infixl "\<squnion>" 65) and
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
  1047
  Inf ("\<Sqinter>_" [900] 900) and
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
  1048
  Sup ("\<Squnion>_" [900] 900) and
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
  1049
  bind (infixl "\<guillemotright>=" 70)
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
  1050
41080
294956ff285b nice syntax for lattice INFI, SUPR;
haftmann
parents: 41075
diff changeset
  1051
no_syntax (xsymbols)
41082
9ff94e7cc3b3 bot comes before top, inf before sup etc.
haftmann
parents: 41080
diff changeset
  1052
  "_INF1"     :: "pttrns \<Rightarrow> 'b \<Rightarrow> 'b"           ("(3\<Sqinter>_./ _)" [0, 10] 10)
9ff94e7cc3b3 bot comes before top, inf before sup etc.
haftmann
parents: 41080
diff changeset
  1053
  "_INF"      :: "pttrn \<Rightarrow> 'a set \<Rightarrow> 'b \<Rightarrow> 'b"  ("(3\<Sqinter>_\<in>_./ _)" [0, 0, 10] 10)
41080
294956ff285b nice syntax for lattice INFI, SUPR;
haftmann
parents: 41075
diff changeset
  1054
  "_SUP1"     :: "pttrns \<Rightarrow> 'b \<Rightarrow> 'b"           ("(3\<Squnion>_./ _)" [0, 10] 10)
294956ff285b nice syntax for lattice INFI, SUPR;
haftmann
parents: 41075
diff changeset
  1055
  "_SUP"      :: "pttrn \<Rightarrow> 'a set \<Rightarrow> 'b \<Rightarrow> 'b"  ("(3\<Squnion>_\<in>_./ _)" [0, 0, 10] 10)
294956ff285b nice syntax for lattice INFI, SUPR;
haftmann
parents: 41075
diff changeset
  1056
36176
3fe7e97ccca8 replaced generic 'hide' command by more conventional 'hide_class', 'hide_type', 'hide_const', 'hide_fact' -- frees some popular keywords;
wenzelm
parents: 36008
diff changeset
  1057
hide_type (open) pred seq
3fe7e97ccca8 replaced generic 'hide' command by more conventional 'hide_class', 'hide_type', 'hide_const', 'hide_fact' -- frees some popular keywords;
wenzelm
parents: 36008
diff changeset
  1058
hide_const (open) Pred eval single bind is_empty singleton if_pred not_pred holds
33111
db5af7b86a2f developing an executable the operator
bulwahn
parents: 33110
diff changeset
  1059
  Empty Insert Join Seq member pred_of_seq "apply" adjunct null the_only eq map not_unique the
30328
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
  1060
ab47f43f7581 added enumeration of predicates
haftmann
parents: 26797
diff changeset
  1061
end