src/HOL/Metis_Examples/Tarski.thy
author huffman
Thu Aug 11 09:11:15 2011 -0700 (2011-08-11)
changeset 44165 d26a45f3c835
parent 43197 c71657bbdbc0
child 45705 a25ff4283352
permissions -rw-r--r--
remove lemma stupid_ext
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(*  Title:      HOL/Metis_Examples/Tarski.thy
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    Author:     Lawrence C. Paulson, Cambridge University Computer Laboratory
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    Author:     Jasmin Blanchette, TU Muenchen
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Metis example featuring the full theorem of Tarski.
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*)
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header {* Metis Example Featuring the Full Theorem of Tarski *}
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theory Tarski
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imports Main "~~/src/HOL/Library/FuncSet"
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begin
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declare [[metis_new_skolemizer]]
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(*Many of these higher-order problems appear to be impossible using the
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current linkup. They often seem to need either higher-order unification
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or explicit reasoning about connectives such as conjunction. The numerous
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set comprehensions are to blame.*)
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record 'a potype =
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  pset  :: "'a set"
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  order :: "('a * 'a) set"
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definition monotone :: "['a => 'a, 'a set, ('a *'a)set] => bool" where
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  "monotone f A r == \<forall>x\<in>A. \<forall>y\<in>A. (x, y): r --> ((f x), (f y)) : r"
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definition least :: "['a => bool, 'a potype] => 'a" where
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  "least P po == @ x. x: pset po & P x &
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                       (\<forall>y \<in> pset po. P y --> (x,y): order po)"
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definition greatest :: "['a => bool, 'a potype] => 'a" where
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  "greatest P po == @ x. x: pset po & P x &
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                          (\<forall>y \<in> pset po. P y --> (y,x): order po)"
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definition lub  :: "['a set, 'a potype] => 'a" where
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  "lub S po == least (%x. \<forall>y\<in>S. (y,x): order po) po"
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definition glb  :: "['a set, 'a potype] => 'a" where
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  "glb S po == greatest (%x. \<forall>y\<in>S. (x,y): order po) po"
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definition isLub :: "['a set, 'a potype, 'a] => bool" where
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  "isLub S po == %L. (L: pset po & (\<forall>y\<in>S. (y,L): order po) &
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                   (\<forall>z\<in>pset po. (\<forall>y\<in>S. (y,z): order po) --> (L,z): order po))"
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definition isGlb :: "['a set, 'a potype, 'a] => bool" where
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  "isGlb S po == %G. (G: pset po & (\<forall>y\<in>S. (G,y): order po) &
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                 (\<forall>z \<in> pset po. (\<forall>y\<in>S. (z,y): order po) --> (z,G): order po))"
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definition "fix"    :: "[('a => 'a), 'a set] => 'a set" where
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  "fix f A  == {x. x: A & f x = x}"
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definition interval :: "[('a*'a) set,'a, 'a ] => 'a set" where
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  "interval r a b == {x. (a,x): r & (x,b): r}"
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definition Bot :: "'a potype => 'a" where
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  "Bot po == least (%x. True) po"
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definition Top :: "'a potype => 'a" where
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  "Top po == greatest (%x. True) po"
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definition PartialOrder :: "('a potype) set" where
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  "PartialOrder == {P. refl_on (pset P) (order P) & antisym (order P) &
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                       trans (order P)}"
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definition CompleteLattice :: "('a potype) set" where
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  "CompleteLattice == {cl. cl: PartialOrder &
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                        (\<forall>S. S \<subseteq> pset cl --> (\<exists>L. isLub S cl L)) &
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                        (\<forall>S. S \<subseteq> pset cl --> (\<exists>G. isGlb S cl G))}"
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definition induced :: "['a set, ('a * 'a) set] => ('a *'a)set" where
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  "induced A r == {(a,b). a : A & b: A & (a,b): r}"
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definition sublattice :: "('a potype * 'a set)set" where
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  "sublattice ==
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      SIGMA cl: CompleteLattice.
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          {S. S \<subseteq> pset cl &
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           (| pset = S, order = induced S (order cl) |): CompleteLattice }"
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abbreviation
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  sublattice_syntax :: "['a set, 'a potype] => bool" ("_ <<= _" [51, 50] 50)
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  where "S <<= cl \<equiv> S : sublattice `` {cl}"
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definition dual :: "'a potype => 'a potype" where
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  "dual po == (| pset = pset po, order = converse (order po) |)"
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locale PO =
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  fixes cl :: "'a potype"
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    and A  :: "'a set"
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    and r  :: "('a * 'a) set"
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  assumes cl_po:  "cl : PartialOrder"
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  defines A_def: "A == pset cl"
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     and  r_def: "r == order cl"
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locale CL = PO +
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  assumes cl_co:  "cl : CompleteLattice"
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definition CLF_set :: "('a potype * ('a => 'a)) set" where
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  "CLF_set = (SIGMA cl: CompleteLattice.
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            {f. f: pset cl -> pset cl & monotone f (pset cl) (order cl)})"
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locale CLF = CL +
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  fixes f :: "'a => 'a"
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    and P :: "'a set"
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  assumes f_cl:  "(cl,f) : CLF_set" (*was the equivalent "f : CLF``{cl}"*)
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  defines P_def: "P == fix f A"
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locale Tarski = CLF +
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  fixes Y     :: "'a set"
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    and intY1 :: "'a set"
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    and v     :: "'a"
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  assumes
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    Y_ss: "Y \<subseteq> P"
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  defines
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    intY1_def: "intY1 == interval r (lub Y cl) (Top cl)"
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    and v_def: "v == glb {x. ((%x: intY1. f x) x, x): induced intY1 r &
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                             x: intY1}
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                      (| pset=intY1, order=induced intY1 r|)"
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subsection {* Partial Order *}
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lemma (in PO) PO_imp_refl_on: "refl_on A r"
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apply (insert cl_po)
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apply (simp add: PartialOrder_def A_def r_def)
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done
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lemma (in PO) PO_imp_sym: "antisym r"
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apply (insert cl_po)
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apply (simp add: PartialOrder_def r_def)
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done
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lemma (in PO) PO_imp_trans: "trans r"
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apply (insert cl_po)
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apply (simp add: PartialOrder_def r_def)
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done
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lemma (in PO) reflE: "x \<in> A ==> (x, x) \<in> r"
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apply (insert cl_po)
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apply (simp add: PartialOrder_def refl_on_def A_def r_def)
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done
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lemma (in PO) antisymE: "[| (a, b) \<in> r; (b, a) \<in> r |] ==> a = b"
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apply (insert cl_po)
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apply (simp add: PartialOrder_def antisym_def r_def)
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done
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lemma (in PO) transE: "[| (a, b) \<in> r; (b, c) \<in> r|] ==> (a,c) \<in> r"
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apply (insert cl_po)
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apply (simp add: PartialOrder_def r_def)
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apply (unfold trans_def, fast)
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done
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lemma (in PO) monotoneE:
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     "[| monotone f A r;  x \<in> A; y \<in> A; (x, y) \<in> r |] ==> (f x, f y) \<in> r"
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by (simp add: monotone_def)
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lemma (in PO) po_subset_po:
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     "S \<subseteq> A ==> (| pset = S, order = induced S r |) \<in> PartialOrder"
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apply (simp (no_asm) add: PartialOrder_def)
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apply auto
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-- {* refl *}
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apply (simp add: refl_on_def induced_def)
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apply (blast intro: reflE)
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-- {* antisym *}
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apply (simp add: antisym_def induced_def)
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apply (blast intro: antisymE)
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-- {* trans *}
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apply (simp add: trans_def induced_def)
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apply (blast intro: transE)
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done
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lemma (in PO) indE: "[| (x, y) \<in> induced S r; S \<subseteq> A |] ==> (x, y) \<in> r"
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by (simp add: add: induced_def)
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lemma (in PO) indI: "[| (x, y) \<in> r; x \<in> S; y \<in> S |] ==> (x, y) \<in> induced S r"
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by (simp add: add: induced_def)
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lemma (in CL) CL_imp_ex_isLub: "S \<subseteq> A ==> \<exists>L. isLub S cl L"
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apply (insert cl_co)
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apply (simp add: CompleteLattice_def A_def)
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done
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declare (in CL) cl_co [simp]
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lemma isLub_lub: "(\<exists>L. isLub S cl L) = isLub S cl (lub S cl)"
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by (simp add: lub_def least_def isLub_def some_eq_ex [symmetric])
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lemma isGlb_glb: "(\<exists>G. isGlb S cl G) = isGlb S cl (glb S cl)"
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by (simp add: glb_def greatest_def isGlb_def some_eq_ex [symmetric])
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lemma isGlb_dual_isLub: "isGlb S cl = isLub S (dual cl)"
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by (simp add: isLub_def isGlb_def dual_def converse_def)
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lemma isLub_dual_isGlb: "isLub S cl = isGlb S (dual cl)"
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by (simp add: isLub_def isGlb_def dual_def converse_def)
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lemma (in PO) dualPO: "dual cl \<in> PartialOrder"
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apply (insert cl_po)
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apply (simp add: PartialOrder_def dual_def refl_on_converse
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                 trans_converse antisym_converse)
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done
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lemma Rdual:
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     "\<forall>S. (S \<subseteq> A -->( \<exists>L. isLub S (| pset = A, order = r|) L))
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      ==> \<forall>S. (S \<subseteq> A --> (\<exists>G. isGlb S (| pset = A, order = r|) G))"
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apply safe
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apply (rule_tac x = "lub {y. y \<in> A & (\<forall>k \<in> S. (y, k) \<in> r)}
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                      (|pset = A, order = r|) " in exI)
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apply (drule_tac x = "{y. y \<in> A & (\<forall>k \<in> S. (y,k) \<in> r) }" in spec)
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apply (drule mp, fast)
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apply (simp add: isLub_lub isGlb_def)
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apply (simp add: isLub_def, blast)
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done
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lemma lub_dual_glb: "lub S cl = glb S (dual cl)"
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by (simp add: lub_def glb_def least_def greatest_def dual_def converse_def)
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lemma glb_dual_lub: "glb S cl = lub S (dual cl)"
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by (simp add: lub_def glb_def least_def greatest_def dual_def converse_def)
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lemma CL_subset_PO: "CompleteLattice \<subseteq> PartialOrder"
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by (simp add: PartialOrder_def CompleteLattice_def, fast)
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lemmas CL_imp_PO = CL_subset_PO [THEN subsetD]
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declare PO.PO_imp_refl_on  [OF PO.intro [OF CL_imp_PO], simp]
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declare PO.PO_imp_sym   [OF PO.intro [OF CL_imp_PO], simp]
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declare PO.PO_imp_trans [OF PO.intro [OF CL_imp_PO], simp]
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lemma (in CL) CO_refl_on: "refl_on A r"
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by (rule PO_imp_refl_on)
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lemma (in CL) CO_antisym: "antisym r"
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by (rule PO_imp_sym)
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lemma (in CL) CO_trans: "trans r"
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by (rule PO_imp_trans)
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lemma CompleteLatticeI:
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     "[| po \<in> PartialOrder; (\<forall>S. S \<subseteq> pset po --> (\<exists>L. isLub S po L));
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         (\<forall>S. S \<subseteq> pset po --> (\<exists>G. isGlb S po G))|]
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      ==> po \<in> CompleteLattice"
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apply (unfold CompleteLattice_def, blast)
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done
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lemma (in CL) CL_dualCL: "dual cl \<in> CompleteLattice"
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apply (insert cl_co)
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apply (simp add: CompleteLattice_def dual_def)
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apply (fold dual_def)
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apply (simp add: isLub_dual_isGlb [symmetric] isGlb_dual_isLub [symmetric]
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                 dualPO)
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done
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lemma (in PO) dualA_iff: "pset (dual cl) = pset cl"
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by (simp add: dual_def)
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lemma (in PO) dualr_iff: "((x, y) \<in> (order(dual cl))) = ((y, x) \<in> order cl)"
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by (simp add: dual_def)
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lemma (in PO) monotone_dual:
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     "monotone f (pset cl) (order cl)
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     ==> monotone f (pset (dual cl)) (order(dual cl))"
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by (simp add: monotone_def dualA_iff dualr_iff)
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lemma (in PO) interval_dual:
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     "[| x \<in> A; y \<in> A|] ==> interval r x y = interval (order(dual cl)) y x"
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apply (simp add: interval_def dualr_iff)
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apply (fold r_def, fast)
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done
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lemma (in PO) interval_not_empty:
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     "[| trans r; interval r a b \<noteq> {} |] ==> (a, b) \<in> r"
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apply (simp add: interval_def)
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apply (unfold trans_def, blast)
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done
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lemma (in PO) interval_imp_mem: "x \<in> interval r a b ==> (a, x) \<in> r"
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by (simp add: interval_def)
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lemma (in PO) left_in_interval:
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     "[| a \<in> A; b \<in> A; interval r a b \<noteq> {} |] ==> a \<in> interval r a b"
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apply (simp (no_asm_simp) add: interval_def)
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apply (simp add: PO_imp_trans interval_not_empty)
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apply (simp add: reflE)
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done
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lemma (in PO) right_in_interval:
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     "[| a \<in> A; b \<in> A; interval r a b \<noteq> {} |] ==> b \<in> interval r a b"
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apply (simp (no_asm_simp) add: interval_def)
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apply (simp add: PO_imp_trans interval_not_empty)
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apply (simp add: reflE)
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done
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subsection {* sublattice *}
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lemma (in PO) sublattice_imp_CL:
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     "S <<= cl  ==> (| pset = S, order = induced S r |) \<in> CompleteLattice"
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by (simp add: sublattice_def CompleteLattice_def A_def r_def)
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lemma (in CL) sublatticeI:
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     "[| S \<subseteq> A; (| pset = S, order = induced S r |) \<in> CompleteLattice |]
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      ==> S <<= cl"
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by (simp add: sublattice_def A_def r_def)
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subsection {* lub *}
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lemma (in CL) lub_unique: "[| S \<subseteq> A; isLub S cl x; isLub S cl L|] ==> x = L"
paulson@23449
   312
apply (rule antisymE)
paulson@23449
   313
apply (auto simp add: isLub_def r_def)
paulson@23449
   314
done
paulson@23449
   315
paulson@23449
   316
lemma (in CL) lub_upper: "[|S \<subseteq> A; x \<in> S|] ==> (x, lub S cl) \<in> r"
paulson@23449
   317
apply (rule CL_imp_ex_isLub [THEN exE], assumption)
paulson@23449
   318
apply (unfold lub_def least_def)
paulson@23449
   319
apply (rule some_equality [THEN ssubst])
paulson@23449
   320
  apply (simp add: isLub_def)
paulson@23449
   321
 apply (simp add: lub_unique A_def isLub_def)
paulson@23449
   322
apply (simp add: isLub_def r_def)
paulson@23449
   323
done
paulson@23449
   324
paulson@23449
   325
lemma (in CL) lub_least:
paulson@23449
   326
     "[| S \<subseteq> A; L \<in> A; \<forall>x \<in> S. (x,L) \<in> r |] ==> (lub S cl, L) \<in> r"
paulson@23449
   327
apply (rule CL_imp_ex_isLub [THEN exE], assumption)
paulson@23449
   328
apply (unfold lub_def least_def)
paulson@23449
   329
apply (rule_tac s=x in some_equality [THEN ssubst])
paulson@23449
   330
  apply (simp add: isLub_def)
paulson@23449
   331
 apply (simp add: lub_unique A_def isLub_def)
paulson@23449
   332
apply (simp add: isLub_def r_def A_def)
paulson@23449
   333
done
paulson@23449
   334
paulson@23449
   335
lemma (in CL) lub_in_lattice: "S \<subseteq> A ==> lub S cl \<in> A"
paulson@23449
   336
apply (rule CL_imp_ex_isLub [THEN exE], assumption)
paulson@23449
   337
apply (unfold lub_def least_def)
paulson@23449
   338
apply (subst some_equality)
paulson@23449
   339
apply (simp add: isLub_def)
paulson@23449
   340
prefer 2 apply (simp add: isLub_def A_def)
paulson@23449
   341
apply (simp add: lub_unique A_def isLub_def)
paulson@23449
   342
done
paulson@23449
   343
paulson@23449
   344
lemma (in CL) lubI:
paulson@23449
   345
     "[| S \<subseteq> A; L \<in> A; \<forall>x \<in> S. (x,L) \<in> r;
paulson@23449
   346
         \<forall>z \<in> A. (\<forall>y \<in> S. (y,z) \<in> r) --> (L,z) \<in> r |] ==> L = lub S cl"
paulson@23449
   347
apply (rule lub_unique, assumption)
paulson@23449
   348
apply (simp add: isLub_def A_def r_def)
paulson@23449
   349
apply (unfold isLub_def)
paulson@23449
   350
apply (rule conjI)
paulson@23449
   351
apply (fold A_def r_def)
paulson@23449
   352
apply (rule lub_in_lattice, assumption)
paulson@23449
   353
apply (simp add: lub_upper lub_least)
paulson@23449
   354
done
paulson@23449
   355
paulson@23449
   356
lemma (in CL) lubIa: "[| S \<subseteq> A; isLub S cl L |] ==> L = lub S cl"
paulson@23449
   357
by (simp add: lubI isLub_def A_def r_def)
paulson@23449
   358
paulson@23449
   359
lemma (in CL) isLub_in_lattice: "isLub S cl L ==> L \<in> A"
paulson@23449
   360
by (simp add: isLub_def  A_def)
paulson@23449
   361
paulson@23449
   362
lemma (in CL) isLub_upper: "[|isLub S cl L; y \<in> S|] ==> (y, L) \<in> r"
paulson@23449
   363
by (simp add: isLub_def r_def)
paulson@23449
   364
paulson@23449
   365
lemma (in CL) isLub_least:
paulson@23449
   366
     "[| isLub S cl L; z \<in> A; \<forall>y \<in> S. (y, z) \<in> r|] ==> (L, z) \<in> r"
paulson@23449
   367
by (simp add: isLub_def A_def r_def)
paulson@23449
   368
paulson@23449
   369
lemma (in CL) isLubI:
paulson@23449
   370
     "[| L \<in> A; \<forall>y \<in> S. (y, L) \<in> r;
paulson@23449
   371
         (\<forall>z \<in> A. (\<forall>y \<in> S. (y, z):r) --> (L, z) \<in> r)|] ==> isLub S cl L"
paulson@23449
   372
by (simp add: isLub_def A_def r_def)
paulson@23449
   373
paulson@23449
   374
paulson@23449
   375
paulson@23449
   376
subsection {* glb *}
paulson@23449
   377
paulson@23449
   378
lemma (in CL) glb_in_lattice: "S \<subseteq> A ==> glb S cl \<in> A"
paulson@23449
   379
apply (subst glb_dual_lub)
paulson@23449
   380
apply (simp add: A_def)
paulson@23449
   381
apply (rule dualA_iff [THEN subst])
paulson@23449
   382
apply (rule CL.lub_in_lattice)
haftmann@27681
   383
apply (rule CL.intro)
haftmann@27681
   384
apply (rule PO.intro)
paulson@23449
   385
apply (rule dualPO)
haftmann@27681
   386
apply (rule CL_axioms.intro)
paulson@23449
   387
apply (rule CL_dualCL)
paulson@23449
   388
apply (simp add: dualA_iff)
paulson@23449
   389
done
paulson@23449
   390
paulson@23449
   391
lemma (in CL) glb_lower: "[|S \<subseteq> A; x \<in> S|] ==> (glb S cl, x) \<in> r"
paulson@23449
   392
apply (subst glb_dual_lub)
paulson@23449
   393
apply (simp add: r_def)
paulson@23449
   394
apply (rule dualr_iff [THEN subst])
paulson@23449
   395
apply (rule CL.lub_upper)
haftmann@27681
   396
apply (rule CL.intro)
haftmann@27681
   397
apply (rule PO.intro)
paulson@23449
   398
apply (rule dualPO)
haftmann@27681
   399
apply (rule CL_axioms.intro)
paulson@23449
   400
apply (rule CL_dualCL)
paulson@23449
   401
apply (simp add: dualA_iff A_def, assumption)
paulson@23449
   402
done
paulson@23449
   403
paulson@23449
   404
text {*
paulson@23449
   405
  Reduce the sublattice property by using substructural properties;
paulson@23449
   406
  abandoned see @{text "Tarski_4.ML"}.
paulson@23449
   407
*}
paulson@23449
   408
paulson@23449
   409
declare (in CLF) f_cl [simp]
paulson@23449
   410
blanchet@38991
   411
declare [[ sledgehammer_problem_prefix = "Tarski__CLF_unnamed_lemma" ]]
paulson@23449
   412
lemma (in CLF) [simp]:
blanchet@42762
   413
    "f: pset cl -> pset cl & monotone f (pset cl) (order cl)"
blanchet@42762
   414
proof -
blanchet@42762
   415
  have "\<forall>u v. (v, u) \<in> CLF_set \<longrightarrow> u \<in> {R \<in> pset v \<rightarrow> pset v. monotone R (pset v) (order v)}"
blanchet@42762
   416
    unfolding CLF_set_def using SigmaE2 by blast
blanchet@42762
   417
  hence F1: "\<forall>u v. (v, u) \<in> CLF_set \<longrightarrow> u \<in> pset v \<rightarrow> pset v \<and> monotone u (pset v) (order v)"
blanchet@42762
   418
    using CollectE by blast
blanchet@42762
   419
  hence "Tarski.monotone f (pset cl) (order cl)" by (metis f_cl)
blanchet@42762
   420
  hence "(cl, f) \<in> CLF_set \<and> Tarski.monotone f (pset cl) (order cl)"
blanchet@42762
   421
    by (metis f_cl)
blanchet@42762
   422
  thus "f \<in> pset cl \<rightarrow> pset cl \<and> Tarski.monotone f (pset cl) (order cl)"
blanchet@42762
   423
    using F1 by metis
blanchet@42762
   424
qed
paulson@23449
   425
paulson@23449
   426
lemma (in CLF) f_in_funcset: "f \<in> A -> A"
paulson@23449
   427
by (simp add: A_def)
paulson@23449
   428
paulson@23449
   429
lemma (in CLF) monotone_f: "monotone f A r"
paulson@23449
   430
by (simp add: A_def r_def)
paulson@23449
   431
paulson@23449
   432
(*never proved, 2007-01-22*)
blanchet@38991
   433
declare [[ sledgehammer_problem_prefix = "Tarski__CLF_CLF_dual" ]]
haftmann@27681
   434
declare (in CLF) CLF_set_def [simp] CL_dualCL [simp] monotone_dual [simp] dualA_iff [simp]
haftmann@27681
   435
blanchet@42762
   436
lemma (in CLF) CLF_dual: "(dual cl, f) \<in> CLF_set"
paulson@23449
   437
apply (simp del: dualA_iff)
paulson@23449
   438
apply (simp)
blanchet@43197
   439
done
haftmann@27681
   440
haftmann@27681
   441
declare (in CLF) CLF_set_def[simp del] CL_dualCL[simp del] monotone_dual[simp del]
paulson@23449
   442
          dualA_iff[simp del]
paulson@23449
   443
paulson@23449
   444
paulson@23449
   445
subsection {* fixed points *}
paulson@23449
   446
paulson@23449
   447
lemma fix_subset: "fix f A \<subseteq> A"
paulson@23449
   448
by (simp add: fix_def, fast)
paulson@23449
   449
paulson@23449
   450
lemma fix_imp_eq: "x \<in> fix f A ==> f x = x"
paulson@23449
   451
by (simp add: fix_def)
paulson@23449
   452
paulson@23449
   453
lemma fixf_subset:
paulson@23449
   454
     "[| A \<subseteq> B; x \<in> fix (%y: A. f y) A |] ==> x \<in> fix f B"
paulson@23449
   455
by (simp add: fix_def, auto)
paulson@23449
   456
paulson@23449
   457
paulson@23449
   458
subsection {* lemmas for Tarski, lub *}
paulson@23449
   459
paulson@23449
   460
(*never proved, 2007-01-22*)
blanchet@38991
   461
declare [[ sledgehammer_problem_prefix = "Tarski__CLF_lubH_le_flubH" ]]
blanchet@43197
   462
  declare CL.lub_least[intro] CLF.f_in_funcset[intro] funcset_mem[intro] CL.lub_in_lattice[intro] PO.transE[intro] PO.monotoneE[intro] CLF.monotone_f[intro] CL.lub_upper[intro]
paulson@23449
   463
lemma (in CLF) lubH_le_flubH:
paulson@23449
   464
     "H = {x. (x, f x) \<in> r & x \<in> A} ==> (lub H cl, f (lub H cl)) \<in> r"
paulson@23449
   465
apply (rule lub_least, fast)
paulson@23449
   466
apply (rule f_in_funcset [THEN funcset_mem])
paulson@23449
   467
apply (rule lub_in_lattice, fast)
paulson@23449
   468
-- {* @{text "\<forall>x:H. (x, f (lub H r)) \<in> r"} *}
paulson@23449
   469
apply (rule ballI)
paulson@23449
   470
(*never proved, 2007-01-22*)
blanchet@38991
   471
using [[ sledgehammer_problem_prefix = "Tarski__CLF_lubH_le_flubH_simpler" ]]
paulson@23449
   472
apply (rule transE)
paulson@23449
   473
-- {* instantiates @{text "(x, ?z) \<in> order cl to (x, f x)"}, *}
paulson@23449
   474
-- {* because of the def of @{text H} *}
paulson@23449
   475
apply fast
paulson@23449
   476
-- {* so it remains to show @{text "(f x, f (lub H cl)) \<in> r"} *}
paulson@23449
   477
apply (rule_tac f = "f" in monotoneE)
paulson@23449
   478
apply (rule monotone_f, fast)
paulson@23449
   479
apply (rule lub_in_lattice, fast)
paulson@23449
   480
apply (rule lub_upper, fast)
paulson@23449
   481
apply assumption
paulson@23449
   482
done
blanchet@43197
   483
  declare CL.lub_least[rule del] CLF.f_in_funcset[rule del]
blanchet@43197
   484
          funcset_mem[rule del] CL.lub_in_lattice[rule del]
blanchet@43197
   485
          PO.transE[rule del] PO.monotoneE[rule del]
blanchet@43197
   486
          CLF.monotone_f[rule del] CL.lub_upper[rule del]
paulson@23449
   487
paulson@23449
   488
(*never proved, 2007-01-22*)
blanchet@38991
   489
declare [[ sledgehammer_problem_prefix = "Tarski__CLF_flubH_le_lubH" ]]
paulson@23449
   490
  declare CLF.f_in_funcset[intro] funcset_mem[intro] CL.lub_in_lattice[intro]
blanchet@43197
   491
       PO.monotoneE[intro] CLF.monotone_f[intro] CL.lub_upper[intro]
paulson@23449
   492
       CLF.lubH_le_flubH[simp]
paulson@23449
   493
lemma (in CLF) flubH_le_lubH:
paulson@23449
   494
     "[|  H = {x. (x, f x) \<in> r & x \<in> A} |] ==> (f (lub H cl), lub H cl) \<in> r"
paulson@23449
   495
apply (rule lub_upper, fast)
paulson@23449
   496
apply (rule_tac t = "H" in ssubst, assumption)
paulson@23449
   497
apply (rule CollectI)
paulson@23449
   498
apply (rule conjI)
blanchet@38991
   499
using [[ sledgehammer_problem_prefix = "Tarski__CLF_flubH_le_lubH_simpler" ]]
paulson@24827
   500
(*??no longer terminates, with combinators
blanchet@43197
   501
apply (metis CO_refl_on lubH_le_flubH monotone_def monotone_f reflD1 reflD2)
paulson@24827
   502
*)
nipkow@30198
   503
apply (metis CO_refl_on lubH_le_flubH monotoneE [OF monotone_f] refl_onD1 refl_onD2)
nipkow@30198
   504
apply (metis CO_refl_on lubH_le_flubH refl_onD2)
paulson@23449
   505
done
blanchet@43197
   506
  declare CLF.f_in_funcset[rule del] funcset_mem[rule del]
blanchet@43197
   507
          CL.lub_in_lattice[rule del] PO.monotoneE[rule del]
blanchet@43197
   508
          CLF.monotone_f[rule del] CL.lub_upper[rule del]
paulson@23449
   509
          CLF.lubH_le_flubH[simp del]
paulson@23449
   510
paulson@23449
   511
paulson@23449
   512
(*never proved, 2007-01-22*)
blanchet@38991
   513
declare [[ sledgehammer_problem_prefix = "Tarski__CLF_lubH_is_fixp" ]]
blanchet@37622
   514
(* Single-step version fails. The conjecture clauses refer to local abstraction
blanchet@37622
   515
functions (Frees). *)
paulson@23449
   516
lemma (in CLF) lubH_is_fixp:
paulson@23449
   517
     "H = {x. (x, f x) \<in> r & x \<in> A} ==> lub H cl \<in> fix f A"
paulson@23449
   518
apply (simp add: fix_def)
paulson@23449
   519
apply (rule conjI)
blanchet@36554
   520
proof -
blanchet@36554
   521
  assume A1: "H = {x. (x, f x) \<in> r \<and> x \<in> A}"
blanchet@42762
   522
  have F1: "\<forall>u v. v \<inter> u \<subseteq> u" by (metis Int_commute Int_lower1)
blanchet@42762
   523
  have "{R. (R, f R) \<in> r} \<inter> {R. R \<in> A} = H" using A1 by (metis Collect_conj_eq)
blanchet@42762
   524
  hence "H \<subseteq> {R. R \<in> A}" using F1 by metis
blanchet@42762
   525
  hence "H \<subseteq> A" by (metis Collect_mem_eq)
blanchet@42762
   526
  hence "lub H cl \<in> A" by (metis lub_in_lattice)
blanchet@42762
   527
  thus "lub {x. (x, f x) \<in> r \<and> x \<in> A} cl \<in> A" using A1 by metis
blanchet@36554
   528
next
blanchet@36554
   529
  assume A1: "H = {x. (x, f x) \<in> r \<and> x \<in> A}"
blanchet@36554
   530
  have F1: "\<forall>v. (\<lambda>R. R \<in> v) = v" by (metis Collect_mem_eq Collect_def)
blanchet@36554
   531
  have F2: "\<forall>w u. (\<lambda>R. u R \<and> w R) = u \<inter> w"
blanchet@36554
   532
    by (metis Collect_conj_eq Collect_def)
blanchet@36554
   533
  have F3: "\<forall>x v. (\<lambda>R. v R \<in> x) = v -` x" by (metis vimage_def Collect_def)
blanchet@36554
   534
  hence F4: "A \<inter> (\<lambda>R. (R, f R)) -` r = H" using A1 by auto
blanchet@36554
   535
  hence F5: "(f (lub H cl), lub H cl) \<in> r"
blanchet@36554
   536
    by (metis F1 F3 F2 Int_commute flubH_le_lubH Collect_def)
blanchet@36554
   537
  have F6: "(lub H cl, f (lub H cl)) \<in> r"
blanchet@36554
   538
    by (metis F1 F3 F2 F4 Int_commute lubH_le_flubH Collect_def)
blanchet@36554
   539
  have "(lub H cl, f (lub H cl)) \<in> r \<longrightarrow> f (lub H cl) = lub H cl"
blanchet@36554
   540
    using F5 by (metis antisymE)
blanchet@36554
   541
  hence "f (lub H cl) = lub H cl" using F6 by metis
blanchet@36554
   542
  thus "H = {x. (x, f x) \<in> r \<and> x \<in> A}
blanchet@36554
   543
        \<Longrightarrow> f (lub {x. (x, f x) \<in> r \<and> x \<in> A} cl) =
blanchet@36554
   544
           lub {x. (x, f x) \<in> r \<and> x \<in> A} cl"
blanchet@36554
   545
    by (metis F4 F2 F3 F1 Collect_def Int_commute)
paulson@24827
   546
qed
paulson@23449
   547
paulson@25710
   548
lemma (in CLF) (*lubH_is_fixp:*)
paulson@23449
   549
     "H = {x. (x, f x) \<in> r & x \<in> A} ==> lub H cl \<in> fix f A"
paulson@23449
   550
apply (simp add: fix_def)
paulson@23449
   551
apply (rule conjI)
blanchet@38991
   552
using [[ sledgehammer_problem_prefix = "Tarski__CLF_lubH_is_fixp_simpler" ]]
nipkow@30198
   553
apply (metis CO_refl_on lubH_le_flubH refl_onD1)
paulson@23449
   554
apply (metis antisymE flubH_le_lubH lubH_le_flubH)
paulson@23449
   555
done
paulson@23449
   556
paulson@23449
   557
lemma (in CLF) fix_in_H:
paulson@23449
   558
     "[| H = {x. (x, f x) \<in> r & x \<in> A};  x \<in> P |] ==> x \<in> H"
nipkow@30198
   559
by (simp add: P_def fix_imp_eq [of _ f A] reflE CO_refl_on
paulson@23449
   560
                    fix_subset [of f A, THEN subsetD])
paulson@23449
   561
paulson@23449
   562
paulson@23449
   563
lemma (in CLF) fixf_le_lubH:
paulson@23449
   564
     "H = {x. (x, f x) \<in> r & x \<in> A} ==> \<forall>x \<in> fix f A. (x, lub H cl) \<in> r"
paulson@23449
   565
apply (rule ballI)
paulson@23449
   566
apply (rule lub_upper, fast)
paulson@23449
   567
apply (rule fix_in_H)
paulson@23449
   568
apply (simp_all add: P_def)
paulson@23449
   569
done
paulson@23449
   570
blanchet@38991
   571
declare [[ sledgehammer_problem_prefix = "Tarski__CLF_lubH_least_fixf" ]]
paulson@23449
   572
lemma (in CLF) lubH_least_fixf:
paulson@23449
   573
     "H = {x. (x, f x) \<in> r & x \<in> A}
paulson@23449
   574
      ==> \<forall>L. (\<forall>y \<in> fix f A. (y,L) \<in> r) --> (lub H cl, L) \<in> r"
paulson@23449
   575
apply (metis P_def lubH_is_fixp)
paulson@23449
   576
done
paulson@23449
   577
paulson@23449
   578
subsection {* Tarski fixpoint theorem 1, first part *}
blanchet@38991
   579
declare [[ sledgehammer_problem_prefix = "Tarski__CLF_T_thm_1_lub" ]]
blanchet@43197
   580
  declare CL.lubI[intro] fix_subset[intro] CL.lub_in_lattice[intro]
paulson@23449
   581
          CLF.fixf_le_lubH[simp] CLF.lubH_least_fixf[simp]
paulson@23449
   582
lemma (in CLF) T_thm_1_lub: "lub P cl = lub {x. (x, f x) \<in> r & x \<in> A} cl"
paulson@23449
   583
(*sledgehammer;*)
paulson@23449
   584
apply (rule sym)
paulson@23449
   585
apply (simp add: P_def)
paulson@23449
   586
apply (rule lubI)
blanchet@38991
   587
using [[ sledgehammer_problem_prefix = "Tarski__CLF_T_thm_1_lub_simpler" ]]
blanchet@43197
   588
apply (metis P_def fix_subset)
paulson@24827
   589
apply (metis Collect_conj_eq Collect_mem_eq Int_commute Int_lower1 lub_in_lattice vimage_def)
paulson@24827
   590
(*??no longer terminates, with combinators
paulson@24827
   591
apply (metis P_def fix_def fixf_le_lubH)
paulson@24827
   592
apply (metis P_def fix_def lubH_least_fixf)
paulson@24827
   593
*)
paulson@24827
   594
apply (simp add: fixf_le_lubH)
paulson@24827
   595
apply (simp add: lubH_least_fixf)
paulson@23449
   596
done
blanchet@43197
   597
  declare CL.lubI[rule del] fix_subset[rule del] CL.lub_in_lattice[rule del]
paulson@23449
   598
          CLF.fixf_le_lubH[simp del] CLF.lubH_least_fixf[simp del]
paulson@23449
   599
paulson@23449
   600
paulson@23449
   601
(*never proved, 2007-01-22*)
blanchet@38991
   602
declare [[ sledgehammer_problem_prefix = "Tarski__CLF_glbH_is_fixp" ]]
blanchet@43197
   603
  declare glb_dual_lub[simp] PO.dualA_iff[intro] CLF.lubH_is_fixp[intro]
paulson@23449
   604
          PO.dualPO[intro] CL.CL_dualCL[intro] PO.dualr_iff[simp]
paulson@23449
   605
lemma (in CLF) glbH_is_fixp: "H = {x. (f x, x) \<in> r & x \<in> A} ==> glb H cl \<in> P"
paulson@23449
   606
  -- {* Tarski for glb *}
paulson@23449
   607
(*sledgehammer;*)
paulson@23449
   608
apply (simp add: glb_dual_lub P_def A_def r_def)
paulson@23449
   609
apply (rule dualA_iff [THEN subst])
paulson@23449
   610
apply (rule CLF.lubH_is_fixp)
haftmann@27681
   611
apply (rule CLF.intro)
haftmann@27681
   612
apply (rule CL.intro)
haftmann@27681
   613
apply (rule PO.intro)
paulson@23449
   614
apply (rule dualPO)
haftmann@27681
   615
apply (rule CL_axioms.intro)
paulson@23449
   616
apply (rule CL_dualCL)
haftmann@27681
   617
apply (rule CLF_axioms.intro)
paulson@23449
   618
apply (rule CLF_dual)
paulson@23449
   619
apply (simp add: dualr_iff dualA_iff)
paulson@23449
   620
done
blanchet@43197
   621
  declare glb_dual_lub[simp del] PO.dualA_iff[rule del] CLF.lubH_is_fixp[rule del]
paulson@23449
   622
          PO.dualPO[rule del] CL.CL_dualCL[rule del] PO.dualr_iff[simp del]
paulson@23449
   623
paulson@23449
   624
paulson@23449
   625
(*never proved, 2007-01-22*)
blanchet@38991
   626
declare [[ sledgehammer_problem_prefix = "Tarski__T_thm_1_glb" ]]  (*ALL THEOREMS*)
paulson@23449
   627
lemma (in CLF) T_thm_1_glb: "glb P cl = glb {x. (f x, x) \<in> r & x \<in> A} cl"
paulson@23449
   628
(*sledgehammer;*)
paulson@23449
   629
apply (simp add: glb_dual_lub P_def A_def r_def)
paulson@23449
   630
apply (rule dualA_iff [THEN subst])
paulson@23449
   631
(*never proved, 2007-01-22*)
blanchet@38991
   632
using [[ sledgehammer_problem_prefix = "Tarski__T_thm_1_glb_simpler" ]]  (*ALL THEOREMS*)
paulson@23449
   633
(*sledgehammer;*)
haftmann@27681
   634
apply (simp add: CLF.T_thm_1_lub [of _ f, OF CLF.intro, OF CL.intro CLF_axioms.intro, OF PO.intro CL_axioms.intro,
haftmann@27681
   635
  OF dualPO CL_dualCL] dualPO CL_dualCL CLF_dual dualr_iff)
paulson@23449
   636
done
paulson@23449
   637
paulson@23449
   638
subsection {* interval *}
paulson@23449
   639
paulson@23449
   640
blanchet@38991
   641
declare [[ sledgehammer_problem_prefix = "Tarski__rel_imp_elem" ]]
nipkow@30198
   642
  declare (in CLF) CO_refl_on[simp] refl_on_def [simp]
paulson@23449
   643
lemma (in CLF) rel_imp_elem: "(x, y) \<in> r ==> x \<in> A"
nipkow@30198
   644
by (metis CO_refl_on refl_onD1)
nipkow@30198
   645
  declare (in CLF) CO_refl_on[simp del]  refl_on_def [simp del]
paulson@23449
   646
blanchet@38991
   647
declare [[ sledgehammer_problem_prefix = "Tarski__interval_subset" ]]
blanchet@43197
   648
  declare (in CLF) rel_imp_elem[intro]
paulson@23449
   649
  declare interval_def [simp]
paulson@23449
   650
lemma (in CLF) interval_subset: "[| a \<in> A; b \<in> A |] ==> interval r a b \<subseteq> A"
nipkow@30198
   651
by (metis CO_refl_on interval_imp_mem refl_onD refl_onD2 rel_imp_elem subset_eq)
blanchet@43197
   652
  declare (in CLF) rel_imp_elem[rule del]
paulson@23449
   653
  declare interval_def [simp del]
paulson@23449
   654
paulson@23449
   655
paulson@23449
   656
lemma (in CLF) intervalI:
paulson@23449
   657
     "[| (a, x) \<in> r; (x, b) \<in> r |] ==> x \<in> interval r a b"
paulson@23449
   658
by (simp add: interval_def)
paulson@23449
   659
paulson@23449
   660
lemma (in CLF) interval_lemma1:
paulson@23449
   661
     "[| S \<subseteq> interval r a b; x \<in> S |] ==> (a, x) \<in> r"
paulson@23449
   662
by (unfold interval_def, fast)
paulson@23449
   663
paulson@23449
   664
lemma (in CLF) interval_lemma2:
paulson@23449
   665
     "[| S \<subseteq> interval r a b; x \<in> S |] ==> (x, b) \<in> r"
paulson@23449
   666
by (unfold interval_def, fast)
paulson@23449
   667
paulson@23449
   668
lemma (in CLF) a_less_lub:
paulson@23449
   669
     "[| S \<subseteq> A; S \<noteq> {};
paulson@23449
   670
         \<forall>x \<in> S. (a,x) \<in> r; \<forall>y \<in> S. (y, L) \<in> r |] ==> (a,L) \<in> r"
paulson@23449
   671
by (blast intro: transE)
paulson@23449
   672
paulson@23449
   673
lemma (in CLF) glb_less_b:
paulson@23449
   674
     "[| S \<subseteq> A; S \<noteq> {};
paulson@23449
   675
         \<forall>x \<in> S. (x,b) \<in> r; \<forall>y \<in> S. (G, y) \<in> r |] ==> (G,b) \<in> r"
paulson@23449
   676
by (blast intro: transE)
paulson@23449
   677
paulson@23449
   678
lemma (in CLF) S_intv_cl:
paulson@23449
   679
     "[| a \<in> A; b \<in> A; S \<subseteq> interval r a b |]==> S \<subseteq> A"
paulson@23449
   680
by (simp add: subset_trans [OF _ interval_subset])
paulson@23449
   681
blanchet@38991
   682
declare [[ sledgehammer_problem_prefix = "Tarski__L_in_interval" ]]  (*ALL THEOREMS*)
paulson@23449
   683
lemma (in CLF) L_in_interval:
paulson@23449
   684
     "[| a \<in> A; b \<in> A; S \<subseteq> interval r a b;
blanchet@43197
   685
         S \<noteq> {}; isLub S cl L; interval r a b \<noteq> {} |] ==> L \<in> interval r a b"
paulson@23449
   686
(*WON'T TERMINATE
paulson@23449
   687
apply (metis CO_trans intervalI interval_lemma1 interval_lemma2 isLub_least isLub_upper subset_empty subset_iff trans_def)
paulson@23449
   688
*)
paulson@23449
   689
apply (rule intervalI)
paulson@23449
   690
apply (rule a_less_lub)
paulson@23449
   691
prefer 2 apply assumption
paulson@23449
   692
apply (simp add: S_intv_cl)
paulson@23449
   693
apply (rule ballI)
paulson@23449
   694
apply (simp add: interval_lemma1)
paulson@23449
   695
apply (simp add: isLub_upper)
paulson@23449
   696
-- {* @{text "(L, b) \<in> r"} *}
paulson@23449
   697
apply (simp add: isLub_least interval_lemma2)
paulson@23449
   698
done
paulson@23449
   699
paulson@23449
   700
(*never proved, 2007-01-22*)
blanchet@38991
   701
declare [[ sledgehammer_problem_prefix = "Tarski__G_in_interval" ]]  (*ALL THEOREMS*)
paulson@23449
   702
lemma (in CLF) G_in_interval:
paulson@23449
   703
     "[| a \<in> A; b \<in> A; interval r a b \<noteq> {}; S \<subseteq> interval r a b; isGlb S cl G;
paulson@23449
   704
         S \<noteq> {} |] ==> G \<in> interval r a b"
paulson@23449
   705
apply (simp add: interval_dual)
haftmann@27681
   706
apply (simp add: CLF.L_in_interval [of _ f, OF CLF.intro, OF CL.intro CLF_axioms.intro, OF PO.intro CL_axioms.intro]
paulson@23449
   707
                 dualA_iff A_def dualPO CL_dualCL CLF_dual isGlb_dual_isLub)
paulson@23449
   708
done
paulson@23449
   709
blanchet@38991
   710
declare [[ sledgehammer_problem_prefix = "Tarski__intervalPO" ]]  (*ALL THEOREMS*)
paulson@23449
   711
lemma (in CLF) intervalPO:
paulson@23449
   712
     "[| a \<in> A; b \<in> A; interval r a b \<noteq> {} |]
paulson@23449
   713
      ==> (| pset = interval r a b, order = induced (interval r a b) r |)
paulson@23449
   714
          \<in> PartialOrder"
blanchet@36554
   715
proof -
blanchet@36554
   716
  assume A1: "a \<in> A"
blanchet@36554
   717
  assume "b \<in> A"
blanchet@36554
   718
  hence "\<forall>u. u \<in> A \<longrightarrow> interval r u b \<subseteq> A" by (metis interval_subset)
blanchet@36554
   719
  hence "interval r a b \<subseteq> A" using A1 by metis
blanchet@36554
   720
  hence "interval r a b \<subseteq> A" by metis
blanchet@36554
   721
  thus ?thesis by (metis po_subset_po)
paulson@23449
   722
qed
paulson@23449
   723
paulson@23449
   724
lemma (in CLF) intv_CL_lub:
paulson@23449
   725
 "[| a \<in> A; b \<in> A; interval r a b \<noteq> {} |]
paulson@23449
   726
  ==> \<forall>S. S \<subseteq> interval r a b -->
paulson@23449
   727
          (\<exists>L. isLub S (| pset = interval r a b,
paulson@23449
   728
                          order = induced (interval r a b) r |)  L)"
paulson@23449
   729
apply (intro strip)
paulson@23449
   730
apply (frule S_intv_cl [THEN CL_imp_ex_isLub])
paulson@23449
   731
prefer 2 apply assumption
paulson@23449
   732
apply assumption
paulson@23449
   733
apply (erule exE)
paulson@23449
   734
-- {* define the lub for the interval as *}
paulson@23449
   735
apply (rule_tac x = "if S = {} then a else L" in exI)
paulson@23449
   736
apply (simp (no_asm_simp) add: isLub_def split del: split_if)
paulson@23449
   737
apply (intro impI conjI)
paulson@23449
   738
-- {* @{text "(if S = {} then a else L) \<in> interval r a b"} *}
paulson@23449
   739
apply (simp add: CL_imp_PO L_in_interval)
paulson@23449
   740
apply (simp add: left_in_interval)
paulson@23449
   741
-- {* lub prop 1 *}
paulson@23449
   742
apply (case_tac "S = {}")
paulson@23449
   743
-- {* @{text "S = {}, y \<in> S = False => everything"} *}
paulson@23449
   744
apply fast
paulson@23449
   745
-- {* @{text "S \<noteq> {}"} *}
paulson@23449
   746
apply simp
paulson@23449
   747
-- {* @{text "\<forall>y:S. (y, L) \<in> induced (interval r a b) r"} *}
paulson@23449
   748
apply (rule ballI)
paulson@23449
   749
apply (simp add: induced_def  L_in_interval)
paulson@23449
   750
apply (rule conjI)
paulson@23449
   751
apply (rule subsetD)
paulson@23449
   752
apply (simp add: S_intv_cl, assumption)
paulson@23449
   753
apply (simp add: isLub_upper)
paulson@23449
   754
-- {* @{text "\<forall>z:interval r a b. (\<forall>y:S. (y, z) \<in> induced (interval r a b) r \<longrightarrow> (if S = {} then a else L, z) \<in> induced (interval r a b) r"} *}
paulson@23449
   755
apply (rule ballI)
paulson@23449
   756
apply (rule impI)
paulson@23449
   757
apply (case_tac "S = {}")
paulson@23449
   758
-- {* @{text "S = {}"} *}
paulson@23449
   759
apply simp
paulson@23449
   760
apply (simp add: induced_def  interval_def)
paulson@23449
   761
apply (rule conjI)
paulson@23449
   762
apply (rule reflE, assumption)
paulson@23449
   763
apply (rule interval_not_empty)
paulson@23449
   764
apply (rule CO_trans)
paulson@23449
   765
apply (simp add: interval_def)
paulson@23449
   766
-- {* @{text "S \<noteq> {}"} *}
paulson@23449
   767
apply simp
paulson@23449
   768
apply (simp add: induced_def  L_in_interval)
paulson@23449
   769
apply (rule isLub_least, assumption)
paulson@23449
   770
apply (rule subsetD)
paulson@23449
   771
prefer 2 apply assumption
paulson@23449
   772
apply (simp add: S_intv_cl, fast)
paulson@23449
   773
done
paulson@23449
   774
paulson@23449
   775
lemmas (in CLF) intv_CL_glb = intv_CL_lub [THEN Rdual]
paulson@23449
   776
paulson@23449
   777
(*never proved, 2007-01-22*)
blanchet@38991
   778
declare [[ sledgehammer_problem_prefix = "Tarski__interval_is_sublattice" ]]  (*ALL THEOREMS*)
paulson@23449
   779
lemma (in CLF) interval_is_sublattice:
paulson@23449
   780
     "[| a \<in> A; b \<in> A; interval r a b \<noteq> {} |]
paulson@23449
   781
        ==> interval r a b <<= cl"
paulson@23449
   782
(*sledgehammer *)
paulson@23449
   783
apply (rule sublatticeI)
paulson@23449
   784
apply (simp add: interval_subset)
paulson@23449
   785
(*never proved, 2007-01-22*)
blanchet@38991
   786
using [[ sledgehammer_problem_prefix = "Tarski__interval_is_sublattice_simpler" ]]
paulson@23449
   787
(*sledgehammer *)
paulson@23449
   788
apply (rule CompleteLatticeI)
paulson@23449
   789
apply (simp add: intervalPO)
paulson@23449
   790
 apply (simp add: intv_CL_lub)
paulson@23449
   791
apply (simp add: intv_CL_glb)
paulson@23449
   792
done
paulson@23449
   793
paulson@23449
   794
lemmas (in CLF) interv_is_compl_latt =
paulson@23449
   795
    interval_is_sublattice [THEN sublattice_imp_CL]
paulson@23449
   796
paulson@23449
   797
paulson@23449
   798
subsection {* Top and Bottom *}
paulson@23449
   799
lemma (in CLF) Top_dual_Bot: "Top cl = Bot (dual cl)"
paulson@23449
   800
by (simp add: Top_def Bot_def least_def greatest_def dualA_iff dualr_iff)
paulson@23449
   801
paulson@23449
   802
lemma (in CLF) Bot_dual_Top: "Bot cl = Top (dual cl)"
paulson@23449
   803
by (simp add: Top_def Bot_def least_def greatest_def dualA_iff dualr_iff)
paulson@23449
   804
blanchet@38991
   805
declare [[ sledgehammer_problem_prefix = "Tarski__Bot_in_lattice" ]]  (*ALL THEOREMS*)
paulson@23449
   806
lemma (in CLF) Bot_in_lattice: "Bot cl \<in> A"
paulson@23449
   807
(*sledgehammer; *)
paulson@23449
   808
apply (simp add: Bot_def least_def)
paulson@23449
   809
apply (rule_tac a="glb A cl" in someI2)
blanchet@43197
   810
apply (simp_all add: glb_in_lattice glb_lower
paulson@23449
   811
                     r_def [symmetric] A_def [symmetric])
paulson@23449
   812
done
paulson@23449
   813
paulson@23449
   814
(*first proved 2007-01-25 after relaxing relevance*)
blanchet@38991
   815
declare [[ sledgehammer_problem_prefix = "Tarski__Top_in_lattice" ]]  (*ALL THEOREMS*)
paulson@23449
   816
lemma (in CLF) Top_in_lattice: "Top cl \<in> A"
paulson@23449
   817
(*sledgehammer;*)
paulson@23449
   818
apply (simp add: Top_dual_Bot A_def)
paulson@23449
   819
(*first proved 2007-01-25 after relaxing relevance*)
blanchet@38991
   820
using [[ sledgehammer_problem_prefix = "Tarski__Top_in_lattice_simpler" ]]  (*ALL THEOREMS*)
paulson@23449
   821
(*sledgehammer*)
paulson@23449
   822
apply (rule dualA_iff [THEN subst])
haftmann@27681
   823
apply (blast intro!: CLF.Bot_in_lattice [OF CLF.intro, OF CL.intro CLF_axioms.intro, OF PO.intro CL_axioms.intro] dualPO CL_dualCL CLF_dual)
paulson@23449
   824
done
paulson@23449
   825
paulson@23449
   826
lemma (in CLF) Top_prop: "x \<in> A ==> (x, Top cl) \<in> r"
paulson@23449
   827
apply (simp add: Top_def greatest_def)
paulson@23449
   828
apply (rule_tac a="lub A cl" in someI2)
paulson@23449
   829
apply (rule someI2)
blanchet@43197
   830
apply (simp_all add: lub_in_lattice lub_upper
paulson@23449
   831
                     r_def [symmetric] A_def [symmetric])
paulson@23449
   832
done
paulson@23449
   833
paulson@23449
   834
(*never proved, 2007-01-22*)
blanchet@43197
   835
declare [[ sledgehammer_problem_prefix = "Tarski__Bot_prop" ]]  (*ALL THEOREMS*)
paulson@23449
   836
lemma (in CLF) Bot_prop: "x \<in> A ==> (Bot cl, x) \<in> r"
blanchet@43197
   837
(*sledgehammer*)
paulson@23449
   838
apply (simp add: Bot_dual_Top r_def)
paulson@23449
   839
apply (rule dualr_iff [THEN subst])
haftmann@27681
   840
apply (simp add: CLF.Top_prop [of _ f, OF CLF.intro, OF CL.intro CLF_axioms.intro, OF PO.intro CL_axioms.intro]
paulson@23449
   841
                 dualA_iff A_def dualPO CL_dualCL CLF_dual)
paulson@23449
   842
done
paulson@23449
   843
blanchet@38991
   844
declare [[ sledgehammer_problem_prefix = "Tarski__Bot_in_lattice" ]]  (*ALL THEOREMS*)
blanchet@43197
   845
lemma (in CLF) Top_intv_not_empty: "x \<in> A  ==> interval r x (Top cl) \<noteq> {}"
paulson@23449
   846
apply (metis Top_in_lattice Top_prop empty_iff intervalI reflE)
paulson@23449
   847
done
paulson@23449
   848
blanchet@38991
   849
declare [[ sledgehammer_problem_prefix = "Tarski__Bot_intv_not_empty" ]]  (*ALL THEOREMS*)
blanchet@43197
   850
lemma (in CLF) Bot_intv_not_empty: "x \<in> A ==> interval r (Bot cl) x \<noteq> {}"
paulson@23449
   851
apply (metis Bot_prop ex_in_conv intervalI reflE rel_imp_elem)
paulson@23449
   852
done
paulson@23449
   853
paulson@23449
   854
paulson@23449
   855
subsection {* fixed points form a partial order *}
paulson@23449
   856
paulson@23449
   857
lemma (in CLF) fixf_po: "(| pset = P, order = induced P r|) \<in> PartialOrder"
paulson@23449
   858
by (simp add: P_def fix_subset po_subset_po)
paulson@23449
   859
paulson@23449
   860
(*first proved 2007-01-25 after relaxing relevance*)
blanchet@38991
   861
declare [[ sledgehammer_problem_prefix = "Tarski__Y_subset_A" ]]
paulson@23449
   862
  declare (in Tarski) P_def[simp] Y_ss [simp]
paulson@23449
   863
  declare fix_subset [intro] subset_trans [intro]
paulson@23449
   864
lemma (in Tarski) Y_subset_A: "Y \<subseteq> A"
blanchet@43197
   865
(*sledgehammer*)
paulson@23449
   866
apply (rule subset_trans [OF _ fix_subset])
paulson@23449
   867
apply (rule Y_ss [simplified P_def])
paulson@23449
   868
done
paulson@23449
   869
  declare (in Tarski) P_def[simp del] Y_ss [simp del]
paulson@23449
   870
  declare fix_subset [rule del] subset_trans [rule del]
paulson@23449
   871
paulson@23449
   872
paulson@23449
   873
lemma (in Tarski) lubY_in_A: "lub Y cl \<in> A"
paulson@23449
   874
  by (rule Y_subset_A [THEN lub_in_lattice])
paulson@23449
   875
paulson@23449
   876
(*never proved, 2007-01-22*)
blanchet@38991
   877
declare [[ sledgehammer_problem_prefix = "Tarski__lubY_le_flubY" ]]  (*ALL THEOREMS*)
paulson@23449
   878
lemma (in Tarski) lubY_le_flubY: "(lub Y cl, f (lub Y cl)) \<in> r"
blanchet@43197
   879
(*sledgehammer*)
paulson@23449
   880
apply (rule lub_least)
paulson@23449
   881
apply (rule Y_subset_A)
paulson@23449
   882
apply (rule f_in_funcset [THEN funcset_mem])
paulson@23449
   883
apply (rule lubY_in_A)
paulson@23449
   884
-- {* @{text "Y \<subseteq> P ==> f x = x"} *}
paulson@23449
   885
apply (rule ballI)
blanchet@38991
   886
using [[ sledgehammer_problem_prefix = "Tarski__lubY_le_flubY_simpler" ]]  (*ALL THEOREMS*)
paulson@23449
   887
(*sledgehammer *)
paulson@23449
   888
apply (rule_tac t = "x" in fix_imp_eq [THEN subst])
paulson@23449
   889
apply (erule Y_ss [simplified P_def, THEN subsetD])
paulson@23449
   890
-- {* @{text "reduce (f x, f (lub Y cl)) \<in> r to (x, lub Y cl) \<in> r"} by monotonicity *}
blanchet@38991
   891
using [[ sledgehammer_problem_prefix = "Tarski__lubY_le_flubY_simplest" ]]  (*ALL THEOREMS*)
paulson@23449
   892
(*sledgehammer*)
paulson@23449
   893
apply (rule_tac f = "f" in monotoneE)
paulson@23449
   894
apply (rule monotone_f)
paulson@23449
   895
apply (simp add: Y_subset_A [THEN subsetD])
paulson@23449
   896
apply (rule lubY_in_A)
paulson@23449
   897
apply (simp add: lub_upper Y_subset_A)
paulson@23449
   898
done
paulson@23449
   899
paulson@23449
   900
(*first proved 2007-01-25 after relaxing relevance*)
blanchet@38991
   901
declare [[ sledgehammer_problem_prefix = "Tarski__intY1_subset" ]]  (*ALL THEOREMS*)
paulson@23449
   902
lemma (in Tarski) intY1_subset: "intY1 \<subseteq> A"
blanchet@43197
   903
(*sledgehammer*)
paulson@23449
   904
apply (unfold intY1_def)
paulson@23449
   905
apply (rule interval_subset)
paulson@23449
   906
apply (rule lubY_in_A)
paulson@23449
   907
apply (rule Top_in_lattice)
paulson@23449
   908
done
paulson@23449
   909
paulson@23449
   910
lemmas (in Tarski) intY1_elem = intY1_subset [THEN subsetD]
paulson@23449
   911
paulson@23449
   912
(*never proved, 2007-01-22*)
blanchet@38991
   913
declare [[ sledgehammer_problem_prefix = "Tarski__intY1_f_closed" ]]  (*ALL THEOREMS*)
paulson@23449
   914
lemma (in Tarski) intY1_f_closed: "x \<in> intY1 \<Longrightarrow> f x \<in> intY1"
blanchet@43197
   915
(*sledgehammer*)
paulson@23449
   916
apply (simp add: intY1_def  interval_def)
paulson@23449
   917
apply (rule conjI)
paulson@23449
   918
apply (rule transE)
paulson@23449
   919
apply (rule lubY_le_flubY)
paulson@23449
   920
-- {* @{text "(f (lub Y cl), f x) \<in> r"} *}
blanchet@38991
   921
using [[ sledgehammer_problem_prefix = "Tarski__intY1_f_closed_simpler" ]]  (*ALL THEOREMS*)
paulson@23449
   922
(*sledgehammer [has been proved before now...]*)
paulson@23449
   923
apply (rule_tac f=f in monotoneE)
paulson@23449
   924
apply (rule monotone_f)
paulson@23449
   925
apply (rule lubY_in_A)
paulson@23449
   926
apply (simp add: intY1_def interval_def  intY1_elem)
paulson@23449
   927
apply (simp add: intY1_def  interval_def)
blanchet@43197
   928
-- {* @{text "(f x, Top cl) \<in> r"} *}
paulson@23449
   929
apply (rule Top_prop)
paulson@23449
   930
apply (rule f_in_funcset [THEN funcset_mem])
paulson@23449
   931
apply (simp add: intY1_def interval_def  intY1_elem)
paulson@23449
   932
done
paulson@23449
   933
blanchet@38991
   934
declare [[ sledgehammer_problem_prefix = "Tarski__intY1_func" ]]  (*ALL THEOREMS*)
haftmann@27368
   935
lemma (in Tarski) intY1_func: "(%x: intY1. f x) \<in> intY1 -> intY1"
haftmann@27368
   936
apply (rule restrict_in_funcset)
haftmann@27368
   937
apply (metis intY1_f_closed restrict_in_funcset)
haftmann@27368
   938
done
paulson@23449
   939
blanchet@38991
   940
declare [[ sledgehammer_problem_prefix = "Tarski__intY1_mono" ]]  (*ALL THEOREMS*)
paulson@24855
   941
lemma (in Tarski) intY1_mono:
paulson@23449
   942
     "monotone (%x: intY1. f x) intY1 (induced intY1 r)"
paulson@23449
   943
(*sledgehammer *)
paulson@23449
   944
apply (auto simp add: monotone_def induced_def intY1_f_closed)
paulson@23449
   945
apply (blast intro: intY1_elem monotone_f [THEN monotoneE])
paulson@23449
   946
done
paulson@23449
   947
paulson@23449
   948
(*proof requires relaxing relevance: 2007-01-25*)
blanchet@38991
   949
declare [[ sledgehammer_problem_prefix = "Tarski__intY1_is_cl" ]]  (*ALL THEOREMS*)
paulson@23449
   950
lemma (in Tarski) intY1_is_cl:
paulson@23449
   951
    "(| pset = intY1, order = induced intY1 r |) \<in> CompleteLattice"
blanchet@43197
   952
(*sledgehammer*)
paulson@23449
   953
apply (unfold intY1_def)
paulson@23449
   954
apply (rule interv_is_compl_latt)
paulson@23449
   955
apply (rule lubY_in_A)
paulson@23449
   956
apply (rule Top_in_lattice)
paulson@23449
   957
apply (rule Top_intv_not_empty)
paulson@23449
   958
apply (rule lubY_in_A)
paulson@23449
   959
done
paulson@23449
   960
paulson@23449
   961
(*never proved, 2007-01-22*)
blanchet@38991
   962
declare [[ sledgehammer_problem_prefix = "Tarski__v_in_P" ]]  (*ALL THEOREMS*)
paulson@23449
   963
lemma (in Tarski) v_in_P: "v \<in> P"
blanchet@43197
   964
(*sledgehammer*)
paulson@23449
   965
apply (unfold P_def)
paulson@23449
   966
apply (rule_tac A = "intY1" in fixf_subset)
paulson@23449
   967
apply (rule intY1_subset)
haftmann@27681
   968
apply (simp add: CLF.glbH_is_fixp [OF CLF.intro, OF CL.intro CLF_axioms.intro, OF PO.intro CL_axioms.intro, OF _ intY1_is_cl, simplified]
haftmann@27681
   969
                 v_def CL_imp_PO intY1_is_cl CLF_set_def intY1_func intY1_mono)
paulson@23449
   970
done
paulson@23449
   971
blanchet@38991
   972
declare [[ sledgehammer_problem_prefix = "Tarski__z_in_interval" ]]  (*ALL THEOREMS*)
paulson@23449
   973
lemma (in Tarski) z_in_interval:
paulson@23449
   974
     "[| z \<in> P; \<forall>y\<in>Y. (y, z) \<in> induced P r |] ==> z \<in> intY1"
paulson@23449
   975
(*sledgehammer *)
paulson@23449
   976
apply (unfold intY1_def P_def)
paulson@23449
   977
apply (rule intervalI)
paulson@23449
   978
prefer 2
paulson@23449
   979
 apply (erule fix_subset [THEN subsetD, THEN Top_prop])
paulson@23449
   980
apply (rule lub_least)
paulson@23449
   981
apply (rule Y_subset_A)
paulson@23449
   982
apply (fast elim!: fix_subset [THEN subsetD])
paulson@23449
   983
apply (simp add: induced_def)
paulson@23449
   984
done
paulson@23449
   985
blanchet@38991
   986
declare [[ sledgehammer_problem_prefix = "Tarski__fz_in_int_rel" ]]  (*ALL THEOREMS*)
paulson@23449
   987
lemma (in Tarski) f'z_in_int_rel: "[| z \<in> P; \<forall>y\<in>Y. (y, z) \<in> induced P r |]
blanchet@43197
   988
      ==> ((%x: intY1. f x) z, z) \<in> induced intY1 r"
berghofe@26806
   989
apply (metis P_def acc_def fix_imp_eq fix_subset indI reflE restrict_apply subset_eq z_in_interval)
paulson@23449
   990
done
paulson@23449
   991
paulson@23449
   992
(*never proved, 2007-01-22*)
blanchet@38991
   993
declare [[ sledgehammer_problem_prefix = "Tarski__tarski_full_lemma" ]]  (*ALL THEOREMS*)
paulson@23449
   994
lemma (in Tarski) tarski_full_lemma:
paulson@23449
   995
     "\<exists>L. isLub Y (| pset = P, order = induced P r |) L"
paulson@23449
   996
apply (rule_tac x = "v" in exI)
paulson@23449
   997
apply (simp add: isLub_def)
paulson@23449
   998
-- {* @{text "v \<in> P"} *}
paulson@23449
   999
apply (simp add: v_in_P)
paulson@23449
  1000
apply (rule conjI)
blanchet@43197
  1001
(*sledgehammer*)
paulson@23449
  1002
-- {* @{text v} is lub *}
paulson@23449
  1003
-- {* @{text "1. \<forall>y:Y. (y, v) \<in> induced P r"} *}
paulson@23449
  1004
apply (rule ballI)
paulson@23449
  1005
apply (simp add: induced_def subsetD v_in_P)
paulson@23449
  1006
apply (rule conjI)
paulson@23449
  1007
apply (erule Y_ss [THEN subsetD])
paulson@23449
  1008
apply (rule_tac b = "lub Y cl" in transE)
paulson@23449
  1009
apply (rule lub_upper)
paulson@23449
  1010
apply (rule Y_subset_A, assumption)
paulson@23449
  1011
apply (rule_tac b = "Top cl" in interval_imp_mem)
paulson@23449
  1012
apply (simp add: v_def)
paulson@23449
  1013
apply (fold intY1_def)
haftmann@27681
  1014
apply (rule CL.glb_in_lattice [OF CL.intro, OF PO.intro CL_axioms.intro, OF _ intY1_is_cl, simplified])
paulson@23449
  1015
 apply (simp add: CL_imp_PO intY1_is_cl, force)
paulson@23449
  1016
-- {* @{text v} is LEAST ub *}
paulson@23449
  1017
apply clarify
paulson@23449
  1018
apply (rule indI)
paulson@23449
  1019
  prefer 3 apply assumption
paulson@23449
  1020
 prefer 2 apply (simp add: v_in_P)
paulson@23449
  1021
apply (unfold v_def)
paulson@23449
  1022
(*never proved, 2007-01-22*)
blanchet@38991
  1023
using [[ sledgehammer_problem_prefix = "Tarski__tarski_full_lemma_simpler" ]]
blanchet@43197
  1024
(*sledgehammer*)
paulson@23449
  1025
apply (rule indE)
paulson@23449
  1026
apply (rule_tac [2] intY1_subset)
paulson@23449
  1027
(*never proved, 2007-01-22*)
blanchet@38991
  1028
using [[ sledgehammer_problem_prefix = "Tarski__tarski_full_lemma_simplest" ]]
blanchet@43197
  1029
(*sledgehammer*)
haftmann@27681
  1030
apply (rule CL.glb_lower [OF CL.intro, OF PO.intro CL_axioms.intro, OF _ intY1_is_cl, simplified])
paulson@23449
  1031
  apply (simp add: CL_imp_PO intY1_is_cl)
paulson@23449
  1032
 apply force
paulson@23449
  1033
apply (simp add: induced_def intY1_f_closed z_in_interval)
paulson@23449
  1034
apply (simp add: P_def fix_imp_eq [of _ f A] reflE
paulson@23449
  1035
                 fix_subset [of f A, THEN subsetD])
paulson@23449
  1036
done
paulson@23449
  1037
paulson@23449
  1038
lemma CompleteLatticeI_simp:
paulson@23449
  1039
     "[| (| pset = A, order = r |) \<in> PartialOrder;
paulson@23449
  1040
         \<forall>S. S \<subseteq> A --> (\<exists>L. isLub S (| pset = A, order = r |)  L) |]
paulson@23449
  1041
    ==> (| pset = A, order = r |) \<in> CompleteLattice"
paulson@23449
  1042
by (simp add: CompleteLatticeI Rdual)
paulson@23449
  1043
paulson@23449
  1044
paulson@23449
  1045
(*never proved, 2007-01-22*)
blanchet@38991
  1046
declare [[ sledgehammer_problem_prefix = "Tarski__Tarski_full" ]]
paulson@23449
  1047
  declare (in CLF) fixf_po[intro] P_def [simp] A_def [simp] r_def [simp]
paulson@23449
  1048
               Tarski.tarski_full_lemma [intro] cl_po [intro] cl_co [intro]
paulson@23449
  1049
               CompleteLatticeI_simp [intro]
paulson@23449
  1050
theorem (in CLF) Tarski_full:
paulson@23449
  1051
     "(| pset = P, order = induced P r|) \<in> CompleteLattice"
blanchet@43197
  1052
(*sledgehammer*)
paulson@23449
  1053
apply (rule CompleteLatticeI_simp)
paulson@23449
  1054
apply (rule fixf_po, clarify)
paulson@23449
  1055
(*never proved, 2007-01-22*)
blanchet@38991
  1056
using [[ sledgehammer_problem_prefix = "Tarski__Tarski_full_simpler" ]]
blanchet@43197
  1057
(*sledgehammer*)
paulson@23449
  1058
apply (simp add: P_def A_def r_def)
haftmann@27681
  1059
apply (blast intro!: Tarski.tarski_full_lemma [OF Tarski.intro, OF CLF.intro Tarski_axioms.intro,
haftmann@27681
  1060
  OF CL.intro CLF_axioms.intro, OF PO.intro CL_axioms.intro] cl_po cl_co f_cl)
paulson@23449
  1061
done
blanchet@36554
  1062
blanchet@36554
  1063
declare (in CLF) fixf_po [rule del] P_def [simp del] A_def [simp del] r_def [simp del]
paulson@23449
  1064
         Tarski.tarski_full_lemma [rule del] cl_po [rule del] cl_co [rule del]
paulson@23449
  1065
         CompleteLatticeI_simp [rule del]
paulson@23449
  1066
paulson@23449
  1067
end