src/HOL/Library/Quotient_Sum.thy
changeset 47308 9caab698dbe4
parent 47094 1a7ad2601cb5
child 47455 26315a545e26
equal deleted inserted replaced
47307:5e5ca36692b3 47308:9caab698dbe4
     1 (*  Title:      HOL/Library/Quotient_Sum.thy
     1 (*  Title:      HOL/Library/Quotient3_Sum.thy
     2     Author:     Cezary Kaliszyk and Christian Urban
     2     Author:     Cezary Kaliszyk and Christian Urban
     3 *)
     3 *)
     4 
     4 
     5 header {* Quotient infrastructure for the sum type *}
     5 header {* Quotient infrastructure for the sum type *}
     6 
     6 
    53 lemma sum_equivp [quot_equiv]:
    53 lemma sum_equivp [quot_equiv]:
    54   "equivp R1 \<Longrightarrow> equivp R2 \<Longrightarrow> equivp (sum_rel R1 R2)"
    54   "equivp R1 \<Longrightarrow> equivp R2 \<Longrightarrow> equivp (sum_rel R1 R2)"
    55   by (blast intro: equivpI sum_reflp sum_symp sum_transp elim: equivpE)
    55   by (blast intro: equivpI sum_reflp sum_symp sum_transp elim: equivpE)
    56   
    56   
    57 lemma sum_quotient [quot_thm]:
    57 lemma sum_quotient [quot_thm]:
    58   assumes q1: "Quotient R1 Abs1 Rep1"
    58   assumes q1: "Quotient3 R1 Abs1 Rep1"
    59   assumes q2: "Quotient R2 Abs2 Rep2"
    59   assumes q2: "Quotient3 R2 Abs2 Rep2"
    60   shows "Quotient (sum_rel R1 R2) (sum_map Abs1 Abs2) (sum_map Rep1 Rep2)"
    60   shows "Quotient3 (sum_rel R1 R2) (sum_map Abs1 Abs2) (sum_map Rep1 Rep2)"
    61   apply (rule QuotientI)
    61   apply (rule Quotient3I)
    62   apply (simp_all add: sum_map.compositionality comp_def sum_map.identity sum_rel_eq sum_rel_map1 sum_rel_map2
    62   apply (simp_all add: sum_map.compositionality comp_def sum_map.identity sum_rel_eq sum_rel_map1 sum_rel_map2
    63     Quotient_abs_rep [OF q1] Quotient_rel_rep [OF q1] Quotient_abs_rep [OF q2] Quotient_rel_rep [OF q2])
    63     Quotient3_abs_rep [OF q1] Quotient3_rel_rep [OF q1] Quotient3_abs_rep [OF q2] Quotient3_rel_rep [OF q2])
    64   using Quotient_rel [OF q1] Quotient_rel [OF q2]
    64   using Quotient3_rel [OF q1] Quotient3_rel [OF q2]
    65   apply (simp add: sum_rel_unfold comp_def split: sum.split)
    65   apply (simp add: sum_rel_unfold comp_def split: sum.split)
    66   done
    66   done
    67 
    67 
    68 declare [[map sum = (sum_rel, sum_quotient)]]
    68 declare [[mapQ3 sum = (sum_rel, sum_quotient)]]
    69 
    69 
    70 lemma sum_Inl_rsp [quot_respect]:
    70 lemma sum_Inl_rsp [quot_respect]:
    71   assumes q1: "Quotient R1 Abs1 Rep1"
    71   assumes q1: "Quotient3 R1 Abs1 Rep1"
    72   assumes q2: "Quotient R2 Abs2 Rep2"
    72   assumes q2: "Quotient3 R2 Abs2 Rep2"
    73   shows "(R1 ===> sum_rel R1 R2) Inl Inl"
    73   shows "(R1 ===> sum_rel R1 R2) Inl Inl"
    74   by auto
    74   by auto
    75 
    75 
    76 lemma sum_Inr_rsp [quot_respect]:
    76 lemma sum_Inr_rsp [quot_respect]:
    77   assumes q1: "Quotient R1 Abs1 Rep1"
    77   assumes q1: "Quotient3 R1 Abs1 Rep1"
    78   assumes q2: "Quotient R2 Abs2 Rep2"
    78   assumes q2: "Quotient3 R2 Abs2 Rep2"
    79   shows "(R2 ===> sum_rel R1 R2) Inr Inr"
    79   shows "(R2 ===> sum_rel R1 R2) Inr Inr"
    80   by auto
    80   by auto
    81 
    81 
    82 lemma sum_Inl_prs [quot_preserve]:
    82 lemma sum_Inl_prs [quot_preserve]:
    83   assumes q1: "Quotient R1 Abs1 Rep1"
    83   assumes q1: "Quotient3 R1 Abs1 Rep1"
    84   assumes q2: "Quotient R2 Abs2 Rep2"
    84   assumes q2: "Quotient3 R2 Abs2 Rep2"
    85   shows "(Rep1 ---> sum_map Abs1 Abs2) Inl = Inl"
    85   shows "(Rep1 ---> sum_map Abs1 Abs2) Inl = Inl"
    86   apply(simp add: fun_eq_iff)
    86   apply(simp add: fun_eq_iff)
    87   apply(simp add: Quotient_abs_rep[OF q1])
    87   apply(simp add: Quotient3_abs_rep[OF q1])
    88   done
    88   done
    89 
    89 
    90 lemma sum_Inr_prs [quot_preserve]:
    90 lemma sum_Inr_prs [quot_preserve]:
    91   assumes q1: "Quotient R1 Abs1 Rep1"
    91   assumes q1: "Quotient3 R1 Abs1 Rep1"
    92   assumes q2: "Quotient R2 Abs2 Rep2"
    92   assumes q2: "Quotient3 R2 Abs2 Rep2"
    93   shows "(Rep2 ---> sum_map Abs1 Abs2) Inr = Inr"
    93   shows "(Rep2 ---> sum_map Abs1 Abs2) Inr = Inr"
    94   apply(simp add: fun_eq_iff)
    94   apply(simp add: fun_eq_iff)
    95   apply(simp add: Quotient_abs_rep[OF q2])
    95   apply(simp add: Quotient3_abs_rep[OF q2])
    96   done
    96   done
    97 
    97 
    98 end
    98 end