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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 7992 | . . 3 ⊢ ((Rel 𝐵 ∧ 𝐴 ∈ 𝐵) → 𝐴 = 〈(1st ‘𝐴), (2nd ‘𝐴)〉) | |
| 2 | simpr 484 | . . 3 ⊢ ((Rel 𝐵 ∧ 𝐴 ∈ 𝐵) → 𝐴 ∈ 𝐵) | |
| 3 | 1, 2 | eqeltrrd 2837 | . 2 ⊢ ((Rel 𝐵 ∧ 𝐴 ∈ 𝐵) → 〈(1st ‘𝐴), (2nd ‘𝐴)〉 ∈ 𝐵) |
| 4 | df-br 5086 | . 2 ⊢ ((1st ‘𝐴)𝐵(2nd ‘𝐴) ↔ 〈(1st ‘𝐴), (2nd ‘𝐴)〉 ∈ 𝐵) | |
| 5 | 3, 4 | sylibr 234 | 1 ⊢ ((Rel 𝐵 ∧ 𝐴 ∈ 𝐵) → (1st ‘𝐴)𝐵(2nd ‘𝐴)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 ∈ wcel 2114 〈cop 4573 class class class wbr 5085 Rel wrel 5636 ‘cfv 6498 1st c1st 7940 2nd c2nd 7941 |
| 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 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2708 ax-sep 5231 ax-nul 5241 ax-pr 5375 ax-un 7689 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2539 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2811 df-nfc 2885 df-ne 2933 df-ral 3052 df-rex 3062 df-rab 3390 df-v 3431 df-dif 3892 df-un 3894 df-in 3896 df-ss 3906 df-nul 4274 df-if 4467 df-sn 4568 df-pr 4570 df-op 4574 df-uni 4851 df-br 5086 df-opab 5148 df-mpt 5167 df-id 5526 df-xp 5637 df-rel 5638 df-cnv 5639 df-co 5640 df-dm 5641 df-rn 5642 df-iota 6454 df-fun 6500 df-fv 6506 df-1st 7942 df-2nd 7943 |
| This theorem is referenced by: cofuval 17849 cofu1 17851 cofu2 17853 cofucl 17855 cofuass 17856 cofulid 17857 cofurid 17858 funcres 17863 cofull 17903 cofth 17904 isnat2 17918 fuccocl 17934 fucidcl 17935 fuclid 17936 fucrid 17937 fucass 17938 fucsect 17942 fucinv 17943 invfuc 17944 fuciso 17945 natpropd 17946 fucpropd 17947 homahom 18006 homadm 18007 homacd 18008 homadmcd 18009 catciso 18078 prfval 18165 prfcl 18169 prf1st 18170 prf2nd 18171 1st2ndprf 18172 evlfcllem 18187 evlfcl 18188 curf1cl 18194 curf2cl 18197 curfcl 18198 uncf1 18202 uncf2 18203 curfuncf 18204 uncfcurf 18205 diag1cl 18208 diag2cl 18212 curf2ndf 18213 yon1cl 18229 oyon1cl 18237 yonedalem1 18238 yonedalem21 18239 yonedalem3a 18240 yonedalem4c 18243 yonedalem22 18244 yonedalem3b 18245 yonedalem3 18246 yonedainv 18247 yonffthlem 18248 yoniso 18251 utop2nei 24215 utop3cls 24216 func1st2nd 49551 oppfval2 49612 idfullsubc 49636 fulloppf 49638 fthoppf 49639 up1st2nd2 49663 uptra 49690 uptrar 49691 uptr2a 49697 diag1 49779 fuco11bALT 49813 precofvalALT 49843 thincciso 49928 thincciso2 49930 eufunclem 49996 |
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