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Mirrors > Home > MPE Home > Th. List > 1st2nd | Structured version Visualization version GIF version |
Description: Reconstruction of a member of a relation in terms of its ordered pair components. (Contributed by NM, 29-Aug-2006.) |
Ref | Expression |
---|---|
1st2nd | ⊢ ((Rel 𝐵 ∧ 𝐴 ∈ 𝐵) → 𝐴 = 〈(1st ‘𝐴), (2nd ‘𝐴)〉) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-rel 5557 | . . 3 ⊢ (Rel 𝐵 ↔ 𝐵 ⊆ (V × V)) | |
2 | ssel2 3962 | . . 3 ⊢ ((𝐵 ⊆ (V × V) ∧ 𝐴 ∈ 𝐵) → 𝐴 ∈ (V × V)) | |
3 | 1, 2 | sylanb 583 | . 2 ⊢ ((Rel 𝐵 ∧ 𝐴 ∈ 𝐵) → 𝐴 ∈ (V × V)) |
4 | 1st2nd2 7722 | . 2 ⊢ (𝐴 ∈ (V × V) → 𝐴 = 〈(1st ‘𝐴), (2nd ‘𝐴)〉) | |
5 | 3, 4 | syl 17 | 1 ⊢ ((Rel 𝐵 ∧ 𝐴 ∈ 𝐵) → 𝐴 = 〈(1st ‘𝐴), (2nd ‘𝐴)〉) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 398 = wceq 1533 ∈ wcel 2110 Vcvv 3495 ⊆ wss 3936 〈cop 4567 × cxp 5548 Rel wrel 5555 ‘cfv 6350 1st c1st 7681 2nd c2nd 7682 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1792 ax-4 1806 ax-5 1907 ax-6 1966 ax-7 2011 ax-8 2112 ax-9 2120 ax-10 2141 ax-11 2156 ax-12 2172 ax-ext 2793 ax-sep 5196 ax-nul 5203 ax-pow 5259 ax-pr 5322 ax-un 7455 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3an 1085 df-tru 1536 df-ex 1777 df-nf 1781 df-sb 2066 df-mo 2618 df-eu 2650 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-ral 3143 df-rex 3144 df-rab 3147 df-v 3497 df-sbc 3773 df-dif 3939 df-un 3941 df-in 3943 df-ss 3952 df-nul 4292 df-if 4468 df-sn 4562 df-pr 4564 df-op 4568 df-uni 4833 df-br 5060 df-opab 5122 df-mpt 5140 df-id 5455 df-xp 5556 df-rel 5557 df-cnv 5558 df-co 5559 df-dm 5560 df-rn 5561 df-iota 6309 df-fun 6352 df-fv 6358 df-1st 7683 df-2nd 7684 |
This theorem is referenced by: 2ndrn 7734 1st2ndbr 7735 funfv1st2nd 7739 funelss 7740 elopabi 7754 cnvf1olem 7799 ordpinq 10359 addassnq 10374 mulassnq 10375 distrnq 10377 mulidnq 10379 recmulnq 10380 ltexnq 10391 fsumcnv 15122 fprodcnv 15331 cofulid 17154 cofurid 17155 idffth 17197 cofull 17198 cofth 17199 ressffth 17202 isnat2 17212 nat1st2nd 17215 homadmcd 17296 catciso 17361 prf1st 17448 prf2nd 17449 1st2ndprf 17450 curfuncf 17482 uncfcurf 17483 curf2ndf 17491 yonffthlem 17526 yoniso 17529 dprd2dlem2 19156 dprd2dlem1 19157 dprd2da 19158 mdetunilem9 21223 2ndcctbss 22057 utop2nei 22853 utop3cls 22854 caubl 23905 wlkop 27403 nvop2 28379 nvvop 28380 nvop 28447 phop 28589 fgreu 30411 1stpreimas 30435 cvmliftlem1 32527 heiborlem3 35085 rngoi 35171 drngoi 35223 isdrngo1 35228 iscrngo2 35269 |
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