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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 7981 | . . 3 ⊢ ((Rel 𝐵 ∧ 𝐴 ∈ 𝐵) → 𝐴 = 〈(1st ‘𝐴), (2nd ‘𝐴)〉) | |
| 2 | simpr 484 | . . 3 ⊢ ((Rel 𝐵 ∧ 𝐴 ∈ 𝐵) → 𝐴 ∈ 𝐵) | |
| 3 | 1, 2 | eqeltrrd 2835 | . 2 ⊢ ((Rel 𝐵 ∧ 𝐴 ∈ 𝐵) → 〈(1st ‘𝐴), (2nd ‘𝐴)〉 ∈ 𝐵) |
| 4 | df-br 5097 | . 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 2113 〈cop 4584 class class class wbr 5096 Rel wrel 5627 ‘cfv 6490 1st c1st 7929 2nd c2nd 7930 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-10 2146 ax-11 2162 ax-12 2182 ax-ext 2706 ax-sep 5239 ax-nul 5249 ax-pr 5375 ax-un 7678 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2537 df-eu 2567 df-clab 2713 df-cleq 2726 df-clel 2809 df-nfc 2883 df-ne 2931 df-ral 3050 df-rex 3059 df-rab 3398 df-v 3440 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4284 df-if 4478 df-sn 4579 df-pr 4581 df-op 4585 df-uni 4862 df-br 5097 df-opab 5159 df-mpt 5178 df-id 5517 df-xp 5628 df-rel 5629 df-cnv 5630 df-co 5631 df-dm 5632 df-rn 5633 df-iota 6446 df-fun 6492 df-fv 6498 df-1st 7931 df-2nd 7932 |
| This theorem is referenced by: cofuval 17804 cofu1 17806 cofu2 17808 cofucl 17810 cofuass 17811 cofulid 17812 cofurid 17813 funcres 17818 cofull 17858 cofth 17859 isnat2 17873 fuccocl 17889 fucidcl 17890 fuclid 17891 fucrid 17892 fucass 17893 fucsect 17897 fucinv 17898 invfuc 17899 fuciso 17900 natpropd 17901 fucpropd 17902 homahom 17961 homadm 17962 homacd 17963 homadmcd 17964 catciso 18033 prfval 18120 prfcl 18124 prf1st 18125 prf2nd 18126 1st2ndprf 18127 evlfcllem 18142 evlfcl 18143 curf1cl 18149 curf2cl 18152 curfcl 18153 uncf1 18157 uncf2 18158 curfuncf 18159 uncfcurf 18160 diag1cl 18163 diag2cl 18167 curf2ndf 18168 yon1cl 18184 oyon1cl 18192 yonedalem1 18193 yonedalem21 18194 yonedalem3a 18195 yonedalem4c 18198 yonedalem22 18199 yonedalem3b 18200 yonedalem3 18201 yonedainv 18202 yonffthlem 18203 yoniso 18206 utop2nei 24192 utop3cls 24193 func1st2nd 49263 oppfval2 49324 idfullsubc 49348 fulloppf 49350 fthoppf 49351 up1st2nd2 49375 uptra 49402 uptrar 49403 uptr2a 49409 diag1 49491 fuco11bALT 49525 precofvalALT 49555 thincciso 49640 thincciso2 49642 eufunclem 49708 |
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