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Mirrors > Home > MPE Home > Th. List > 1st2ndbr | Structured version Visualization version GIF version |
Description: Express an element of a relation as a relationship between first and second components. (Contributed by Mario Carneiro, 22-Jun-2016.) |
Ref | Expression |
---|---|
1st2ndbr | ⊢ ((Rel 𝐵 ∧ 𝐴 ∈ 𝐵) → (1st ‘𝐴)𝐵(2nd ‘𝐴)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 1st2nd 7967 | . . 3 ⊢ ((Rel 𝐵 ∧ 𝐴 ∈ 𝐵) → 𝐴 = 〈(1st ‘𝐴), (2nd ‘𝐴)〉) | |
2 | simpr 485 | . . 3 ⊢ ((Rel 𝐵 ∧ 𝐴 ∈ 𝐵) → 𝐴 ∈ 𝐵) | |
3 | 1, 2 | eqeltrrd 2839 | . 2 ⊢ ((Rel 𝐵 ∧ 𝐴 ∈ 𝐵) → 〈(1st ‘𝐴), (2nd ‘𝐴)〉 ∈ 𝐵) |
4 | df-br 5104 | . 2 ⊢ ((1st ‘𝐴)𝐵(2nd ‘𝐴) ↔ 〈(1st ‘𝐴), (2nd ‘𝐴)〉 ∈ 𝐵) | |
5 | 3, 4 | sylibr 233 | 1 ⊢ ((Rel 𝐵 ∧ 𝐴 ∈ 𝐵) → (1st ‘𝐴)𝐵(2nd ‘𝐴)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 396 ∈ wcel 2106 〈cop 4590 class class class wbr 5103 Rel wrel 5636 ‘cfv 6493 1st c1st 7915 2nd c2nd 7916 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2707 ax-sep 5254 ax-nul 5261 ax-pr 5382 ax-un 7668 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 846 df-3an 1089 df-tru 1544 df-fal 1554 df-ex 1782 df-nf 1786 df-sb 2068 df-mo 2538 df-eu 2567 df-clab 2714 df-cleq 2728 df-clel 2814 df-nfc 2887 df-ral 3063 df-rex 3072 df-rab 3406 df-v 3445 df-dif 3911 df-un 3913 df-in 3915 df-ss 3925 df-nul 4281 df-if 4485 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4864 df-br 5104 df-opab 5166 df-mpt 5187 df-id 5529 df-xp 5637 df-rel 5638 df-cnv 5639 df-co 5640 df-dm 5641 df-rn 5642 df-iota 6445 df-fun 6495 df-fv 6501 df-1st 7917 df-2nd 7918 |
This theorem is referenced by: cofuval 17760 cofu1 17762 cofu2 17764 cofucl 17766 cofuass 17767 cofulid 17768 cofurid 17769 funcres 17774 cofull 17813 cofth 17814 isnat2 17827 fuccocl 17845 fucidcl 17846 fuclid 17847 fucrid 17848 fucass 17849 fucsect 17853 fucinv 17854 invfuc 17855 fuciso 17856 natpropd 17857 fucpropd 17858 homahom 17917 homadm 17918 homacd 17919 homadmcd 17920 catciso 17989 prfval 18079 prfcl 18083 prf1st 18084 prf2nd 18085 1st2ndprf 18086 evlfcllem 18102 evlfcl 18103 curf1cl 18109 curf2cl 18112 curfcl 18113 uncf1 18117 uncf2 18118 curfuncf 18119 uncfcurf 18120 diag1cl 18123 diag2cl 18127 curf2ndf 18128 yon1cl 18144 oyon1cl 18152 yonedalem1 18153 yonedalem21 18154 yonedalem3a 18155 yonedalem4c 18158 yonedalem22 18159 yonedalem3b 18160 yonedalem3 18161 yonedainv 18162 yonffthlem 18163 yoniso 18166 utop2nei 23586 utop3cls 23587 thincciso 47001 |
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