| author | wenzelm | 
| Sat, 09 Jan 2016 22:22:17 +0100 | |
| changeset 62114 | a7cf464933f7 | 
| parent 61424 | c3658c18b7bc | 
| child 62954 | c5d0fdc260fa | 
| permissions | -rw-r--r-- | 
| 47455 | 1 | (* Title: HOL/Library/Quotient_Product.thy | 
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changeset | 2 | Author: Cezary Kaliszyk and Christian Urban | 
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changeset | 3 | *) | 
| 35788 | 4 | |
| 60500 | 5 | section \<open>Quotient infrastructure for the product type\<close> | 
| 35788 | 6 | |
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changeset | 7 | theory Quotient_Product | 
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changeset | 8 | imports Main Quotient_Syntax | 
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changeset | 9 | begin | 
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changeset | 10 | |
| 60500 | 11 | subsection \<open>Rules for the Quotient package\<close> | 
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changeset | 12 | |
| 55932 | 13 | lemma map_prod_id [id_simps]: | 
| 14 | shows "map_prod id id = id" | |
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changeset | 15 | by (simp add: fun_eq_iff) | 
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changeset | 16 | |
| 55944 | 17 | lemma rel_prod_eq [id_simps]: | 
| 18 | shows "rel_prod (op =) (op =) = (op =)" | |
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changeset | 19 | by (simp add: fun_eq_iff) | 
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changeset | 20 | |
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changeset | 21 | lemma prod_equivp [quot_equiv]: | 
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changeset | 22 | assumes "equivp R1" | 
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changeset | 23 | assumes "equivp R2" | 
| 55944 | 24 | shows "equivp (rel_prod R1 R2)" | 
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changeset | 25 | using assms by (auto intro!: equivpI reflpI sympI transpI elim!: equivpE elim: reflpE sympE transpE) | 
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changeset | 26 | |
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changeset | 27 | lemma prod_quotient [quot_thm]: | 
| 47308 | 28 | assumes "Quotient3 R1 Abs1 Rep1" | 
| 29 | assumes "Quotient3 R2 Abs2 Rep2" | |
| 55944 | 30 | shows "Quotient3 (rel_prod R1 R2) (map_prod Abs1 Abs2) (map_prod Rep1 Rep2)" | 
| 47308 | 31 | apply (rule Quotient3I) | 
| 55932 | 32 | apply (simp add: map_prod.compositionality comp_def map_prod.identity | 
| 47308 | 33 | Quotient3_abs_rep [OF assms(1)] Quotient3_abs_rep [OF assms(2)]) | 
| 34 | apply (simp add: split_paired_all Quotient3_rel_rep [OF assms(1)] Quotient3_rel_rep [OF assms(2)]) | |
| 35 | using Quotient3_rel [OF assms(1)] Quotient3_rel [OF assms(2)] | |
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changeset | 36 | apply (auto simp add: split_paired_all) | 
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changeset | 37 | done | 
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changeset | 38 | |
| 55944 | 39 | declare [[mapQ3 prod = (rel_prod, prod_quotient)]] | 
| 47094 | 40 | |
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changeset | 41 | lemma Pair_rsp [quot_respect]: | 
| 47308 | 42 | assumes q1: "Quotient3 R1 Abs1 Rep1" | 
| 43 | assumes q2: "Quotient3 R2 Abs2 Rep2" | |
| 55944 | 44 | shows "(R1 ===> R2 ===> rel_prod R1 R2) Pair Pair" | 
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changeset | 45 | by (rule Pair_transfer) | 
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changeset | 46 | |
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changeset | 47 | lemma Pair_prs [quot_preserve]: | 
| 47308 | 48 | assumes q1: "Quotient3 R1 Abs1 Rep1" | 
| 49 | assumes q2: "Quotient3 R2 Abs2 Rep2" | |
| 55932 | 50 | shows "(Rep1 ---> Rep2 ---> (map_prod Abs1 Abs2)) Pair = Pair" | 
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changeset | 51 | apply(simp add: fun_eq_iff) | 
| 47308 | 52 | apply(simp add: Quotient3_abs_rep[OF q1] Quotient3_abs_rep[OF q2]) | 
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changeset | 53 | done | 
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changeset | 54 | |
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changeset | 55 | lemma fst_rsp [quot_respect]: | 
| 47308 | 56 | assumes "Quotient3 R1 Abs1 Rep1" | 
| 57 | assumes "Quotient3 R2 Abs2 Rep2" | |
| 55944 | 58 | shows "(rel_prod R1 R2 ===> R1) fst fst" | 
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changeset | 59 | by auto | 
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changeset | 60 | |
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changeset | 61 | lemma fst_prs [quot_preserve]: | 
| 47308 | 62 | assumes q1: "Quotient3 R1 Abs1 Rep1" | 
| 63 | assumes q2: "Quotient3 R2 Abs2 Rep2" | |
| 55932 | 64 | shows "(map_prod Rep1 Rep2 ---> Abs1) fst = fst" | 
| 47308 | 65 | by (simp add: fun_eq_iff Quotient3_abs_rep[OF q1]) | 
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changeset | 66 | |
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changeset | 67 | lemma snd_rsp [quot_respect]: | 
| 47308 | 68 | assumes "Quotient3 R1 Abs1 Rep1" | 
| 69 | assumes "Quotient3 R2 Abs2 Rep2" | |
| 55944 | 70 | shows "(rel_prod R1 R2 ===> R2) snd snd" | 
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changeset | 71 | by auto | 
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changeset | 72 | |
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changeset | 73 | lemma snd_prs [quot_preserve]: | 
| 47308 | 74 | assumes q1: "Quotient3 R1 Abs1 Rep1" | 
| 75 | assumes q2: "Quotient3 R2 Abs2 Rep2" | |
| 55932 | 76 | shows "(map_prod Rep1 Rep2 ---> Abs2) snd = snd" | 
| 47308 | 77 | by (simp add: fun_eq_iff Quotient3_abs_rep[OF q2]) | 
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changeset | 78 | |
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changeset | 79 | lemma case_prod_rsp [quot_respect]: | 
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changeset | 80 | shows "((R1 ===> R2 ===> (op =)) ===> (rel_prod R1 R2) ===> (op =)) case_prod case_prod" | 
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changeset | 81 | by (rule case_prod_transfer) | 
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changeset | 82 | |
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changeset | 83 | lemma split_prs [quot_preserve]: | 
| 47308 | 84 | assumes q1: "Quotient3 R1 Abs1 Rep1" | 
| 85 | and q2: "Quotient3 R2 Abs2 Rep2" | |
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changeset | 86 | shows "(((Abs1 ---> Abs2 ---> id) ---> map_prod Rep1 Rep2 ---> id) case_prod) = case_prod" | 
| 47308 | 87 | by (simp add: fun_eq_iff Quotient3_abs_rep[OF q1] Quotient3_abs_rep[OF q2]) | 
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changeset | 88 | |
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changeset | 89 | lemma [quot_respect]: | 
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changeset | 90 | shows "((R2 ===> R2 ===> op =) ===> (R1 ===> R1 ===> op =) ===> | 
| 55944 | 91 | rel_prod R2 R1 ===> rel_prod R2 R1 ===> op =) rel_prod rel_prod" | 
| 58916 | 92 | by (rule prod.rel_transfer) | 
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changeset | 93 | |
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changeset | 94 | lemma [quot_preserve]: | 
| 47308 | 95 | assumes q1: "Quotient3 R1 abs1 rep1" | 
| 96 | and q2: "Quotient3 R2 abs2 rep2" | |
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changeset | 97 | shows "((abs1 ---> abs1 ---> id) ---> (abs2 ---> abs2 ---> id) ---> | 
| 55944 | 98 | map_prod rep1 rep2 ---> map_prod rep1 rep2 ---> id) rel_prod = rel_prod" | 
| 47308 | 99 | by (simp add: fun_eq_iff Quotient3_abs_rep[OF q1] Quotient3_abs_rep[OF q2]) | 
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changeset | 100 | |
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changeset | 101 | lemma [quot_preserve]: | 
| 55944 | 102 | shows"(rel_prod ((rep1 ---> rep1 ---> id) R1) ((rep2 ---> rep2 ---> id) R2) | 
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changeset | 103 | (l1, l2) (r1, r2)) = (R1 (rep1 l1) (rep1 r1) \<and> R2 (rep2 l2) (rep2 r2))" | 
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changeset | 104 | by simp | 
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changeset | 105 | |
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changeset | 106 | declare prod.inject[quot_preserve] | 
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changeset | 107 | |
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changeset | 108 | end |