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| Mirrors > Home > MPE Home > Th. List > fvsng | Structured version Visualization version GIF version | ||
| Description: The value of a singleton of an ordered pair is the second member. (Contributed by NM, 26-Oct-2012.) (Proof shortened by BJ, 25-Feb-2023.) |
| Ref | Expression |
|---|---|
| fvsng | ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → ({〈𝐴, 𝐵〉}‘𝐴) = 𝐵) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | funsng 6551 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → Fun {〈𝐴, 𝐵〉}) | |
| 2 | opex 5419 | . . 3 ⊢ 〈𝐴, 𝐵〉 ∈ V | |
| 3 | 2 | snid 4621 | . 2 ⊢ 〈𝐴, 𝐵〉 ∈ {〈𝐴, 𝐵〉} |
| 4 | funopfv 6891 | . 2 ⊢ (Fun {〈𝐴, 𝐵〉} → (〈𝐴, 𝐵〉 ∈ {〈𝐴, 𝐵〉} → ({〈𝐴, 𝐵〉}‘𝐴) = 𝐵)) | |
| 5 | 1, 3, 4 | mpisyl 21 | 1 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → ({〈𝐴, 𝐵〉}‘𝐴) = 𝐵) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 = wceq 1542 ∈ wcel 2114 {csn 4582 〈cop 4588 Fun wfun 6494 ‘cfv 6500 |
| 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-12 2185 ax-ext 2709 ax-sep 5243 ax-pr 5379 |
| 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-ral 3053 df-rex 3063 df-rab 3402 df-v 3444 df-dif 3906 df-un 3908 df-in 3910 df-ss 3920 df-nul 4288 df-if 4482 df-sn 4583 df-pr 4585 df-op 4589 df-uni 4866 df-br 5101 df-opab 5163 df-id 5527 df-xp 5638 df-rel 5639 df-cnv 5640 df-co 5641 df-dm 5642 df-iota 6456 df-fun 6502 df-fv 6508 |
| This theorem is referenced by: fvsn 7137 fvsnun1 7138 fsnunfv 7143 fvpr1g 7146 fsnex 7239 suppsnop 8130 mapsnend 8985 enfixsn 9026 axdc3lem4 10375 fseq1p1m1 13526 1fv 13575 s1fv 14546 sumsnf 15678 prodsn 15897 prodsnf 15899 seq1st 16510 vdwlem8 16928 setsid 17146 mgm1 18595 sgrp1 18666 mnd1 18716 mnd1id 18717 gsumws1 18775 grp1 18989 dprdsn 19979 ring1 20257 ixpsnbasval 21172 frgpcyg 21540 mat1dimscm 22431 mat1dimmul 22432 mat1rhmelval 22436 m1detdiag 22553 pt1hmeo 23762 noextenddif 27648 noextendlt 27649 noextendgt 27650 1loopgrvd0 29590 1hevtxdg0 29591 1hevtxdg1 29592 1egrvtxdg1 29595 wlkl0 30454 actfunsnrndisj 34782 reprsuc 34792 breprexplema 34807 cvmliftlem7 35504 cvmliftlem13 35509 bj-fununsn2 37503 sticksstones9 42518 sticksstones11 42520 frlmsnic 42904 sumsnd 45380 ovnovollem1 47008 nnsum3primesprm 48144 lincvalsng 48770 snlindsntorlem 48824 lmod1lem2 48842 lmod1lem3 48843 0aryfvalelfv 48989 1arympt1fv 48993 ovsng 49211 |
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