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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 486 | . . 3 ⊢ ((Rel 𝐵 ∧ 𝐴 ∈ 𝐵) → 𝐴 ∈ 𝐵) | |
| 3 | 1, 2 | eqeltrrd 2842 | . 2 ⊢ ((Rel 𝐵 ∧ 𝐴 ∈ 𝐵) → 〈(1st ‘𝐴), (2nd ‘𝐴)〉 ∈ 𝐵) |
| 4 | df-br 5076 | . 2 ⊢ ((1st ‘𝐴)𝐵(2nd ‘𝐴) ↔ 〈(1st ‘𝐴), (2nd ‘𝐴)〉 ∈ 𝐵) | |
| 5 | 3, 4 | sylibr 236 | 1 ⊢ ((Rel 𝐵 ∧ 𝐴 ∈ 𝐵) → (1st ‘𝐴)𝐵(2nd ‘𝐴)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 397 ∈ wcel 2121 〈cop 4564 class class class wbr 5075 Rel wrel 5626 ‘cfv 6489 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 1803 ax-4 1817 ax-5 1918 ax-6 1975 ax-7 2016 ax-8 2123 ax-9 2131 ax-10 2154 ax-11 2170 ax-12 2191 ax-ext 2713 ax-sep 5221 ax-nul 5231 ax-pr 5365 ax-un 7682 |
| This theorem depends on definitions: df-bi 209 df-an 398 df-or 855 df-3an 1095 df-tru 1551 df-fal 1561 df-ex 1788 df-nf 1792 df-sb 2075 df-mo 2545 df-eu 2575 df-clab 2720 df-cleq 2733 df-clel 2816 df-nfc 2890 df-ne 2937 df-ral 3056 df-rex 3066 df-rab 3394 df-v 3435 df-dif 3888 df-un 3890 df-in 3892 df-ss 3902 df-nul 4265 df-if 4458 df-sn 4559 df-pr 4561 df-op 4565 df-uni 4842 df-br 5076 df-opab 5138 df-mpt 5157 df-id 5516 df-xp 5627 df-rel 5628 df-cnv 5629 df-co 5630 df-dm 5631 df-rn 5632 df-iota 6445 df-fun 6491 df-fv 6497 df-1st 7935 df-2nd 7936 |
| This theorem is referenced by: cofuval 17844 cofu1 17846 cofu2 17848 cofucl 17850 cofuass 17851 cofulid 17852 cofurid 17853 funcres 17858 cofull 17898 cofth 17899 isnat2 17913 fuccocl 17929 fucidcl 17930 fuclid 17931 fucrid 17932 fucass 17933 fucsect 17937 fucinv 17938 invfuc 17939 fuciso 17940 natpropd 17941 fucpropd 17942 homahom 18001 homadm 18002 homacd 18003 homadmcd 18004 catciso 18073 prfval 18160 prfcl 18164 prf1st 18165 prf2nd 18166 1st2ndprf 18167 evlfcllem 18182 evlfcl 18183 curf1cl 18189 curf2cl 18192 curfcl 18193 uncf1 18197 uncf2 18198 curfuncf 18199 uncfcurf 18200 diag1cl 18203 diag2cl 18207 curf2ndf 18208 yon1cl 18224 oyon1cl 18232 yonedalem1 18233 yonedalem21 18234 yonedalem3a 18235 yonedalem4c 18238 yonedalem22 18239 yonedalem3b 18240 yonedalem3 18241 yonedainv 18242 yonffthlem 18243 yoniso 18246 utop2nei 24237 utop3cls 24238 func1st2nd 49580 oppfval2 49641 idfullsubc 49665 fulloppf 49667 fthoppf 49668 up1st2nd2 49692 uptra 49719 uptrar 49720 uptr2a 49726 diag1 49808 fuco11bALT 49842 precofvalALT 49872 thincciso 49957 thincciso2 49959 eufunclem 50025 |
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