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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 7985 | . . 3 ⊢ ((Rel 𝐵 ∧ 𝐴 ∈ 𝐵) → 𝐴 = 〈(1st ‘𝐴), (2nd ‘𝐴)〉) | |
| 2 | simpr 484 | . . 3 ⊢ ((Rel 𝐵 ∧ 𝐴 ∈ 𝐵) → 𝐴 ∈ 𝐵) | |
| 3 | 1, 2 | eqeltrrd 2838 | . 2 ⊢ ((Rel 𝐵 ∧ 𝐴 ∈ 𝐵) → 〈(1st ‘𝐴), (2nd ‘𝐴)〉 ∈ 𝐵) |
| 4 | df-br 5100 | . 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 4587 class class class wbr 5099 Rel wrel 5630 ‘cfv 6493 1st c1st 7933 2nd c2nd 7934 |
| 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 2709 ax-sep 5242 ax-nul 5252 ax-pr 5378 ax-un 7682 |
| 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 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-ral 3053 df-rex 3062 df-rab 3401 df-v 3443 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-nul 4287 df-if 4481 df-sn 4582 df-pr 4584 df-op 4588 df-uni 4865 df-br 5100 df-opab 5162 df-mpt 5181 df-id 5520 df-xp 5631 df-rel 5632 df-cnv 5633 df-co 5634 df-dm 5635 df-rn 5636 df-iota 6449 df-fun 6495 df-fv 6501 df-1st 7935 df-2nd 7936 |
| This theorem is referenced by: cofuval 17810 cofu1 17812 cofu2 17814 cofucl 17816 cofuass 17817 cofulid 17818 cofurid 17819 funcres 17824 cofull 17864 cofth 17865 isnat2 17879 fuccocl 17895 fucidcl 17896 fuclid 17897 fucrid 17898 fucass 17899 fucsect 17903 fucinv 17904 invfuc 17905 fuciso 17906 natpropd 17907 fucpropd 17908 homahom 17967 homadm 17968 homacd 17969 homadmcd 17970 catciso 18039 prfval 18126 prfcl 18130 prf1st 18131 prf2nd 18132 1st2ndprf 18133 evlfcllem 18148 evlfcl 18149 curf1cl 18155 curf2cl 18158 curfcl 18159 uncf1 18163 uncf2 18164 curfuncf 18165 uncfcurf 18166 diag1cl 18169 diag2cl 18173 curf2ndf 18174 yon1cl 18190 oyon1cl 18198 yonedalem1 18199 yonedalem21 18200 yonedalem3a 18201 yonedalem4c 18204 yonedalem22 18205 yonedalem3b 18206 yonedalem3 18207 yonedainv 18208 yonffthlem 18209 yoniso 18212 utop2nei 24198 utop3cls 24199 func1st2nd 49388 oppfval2 49449 idfullsubc 49473 fulloppf 49475 fthoppf 49476 up1st2nd2 49500 uptra 49527 uptrar 49528 uptr2a 49534 diag1 49616 fuco11bALT 49650 precofvalALT 49680 thincciso 49765 thincciso2 49767 eufunclem 49833 |
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