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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 7987 | . . 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 5087 | . 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 4574 class class class wbr 5086 Rel wrel 5631 ‘cfv 6494 1st c1st 7935 2nd c2nd 7936 |
| 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 5232 ax-nul 5242 ax-pr 5372 ax-un 7684 |
| 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 3063 df-rab 3391 df-v 3432 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-nul 4275 df-if 4468 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-br 5087 df-opab 5149 df-mpt 5168 df-id 5521 df-xp 5632 df-rel 5633 df-cnv 5634 df-co 5635 df-dm 5636 df-rn 5637 df-iota 6450 df-fun 6496 df-fv 6502 df-1st 7937 df-2nd 7938 |
| 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 24229 utop3cls 24230 func1st2nd 49567 oppfval2 49628 idfullsubc 49652 fulloppf 49654 fthoppf 49655 up1st2nd2 49679 uptra 49706 uptrar 49707 uptr2a 49713 diag1 49795 fuco11bALT 49829 precofvalALT 49859 thincciso 49944 thincciso2 49946 eufunclem 50012 |
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