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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 6591 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → Fun {〈𝐴, 𝐵〉}) | |
| 2 | opex 5431 | . . 3 ⊢ 〈𝐴, 𝐵〉 ∈ V | |
| 3 | 2 | snid 4619 | . 2 ⊢ 〈𝐴, 𝐵〉 ∈ {〈𝐴, 𝐵〉} |
| 4 | funopfv 6934 | . 2 ⊢ (Fun {〈𝐴, 𝐵〉} → (〈𝐴, 𝐵〉 ∈ {〈𝐴, 𝐵〉} → ({〈𝐴, 𝐵〉}‘𝐴) = 𝐵)) | |
| 5 | 1, 3, 4 | mpisyl 22 | 1 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → ({〈𝐴, 𝐵〉}‘𝐴) = 𝐵) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 = wceq 1569 ∈ wcel 2144 {csn 4584 〈cop 4834 Fun wfun 6532 ‘cfv 6538 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-12 2212 ax-ext 2732 ax-sep 5248 ax-pr 5390 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2099 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-ral 3077 df-rex 3087 df-rab 3413 df-v 3452 df-ss 3896 df-dif 4047 df-in 4091 df-un 4151 df-nul 4279 df-if 4482 df-sn 4585 df-pr 4587 df-op 4835 df-uni 4867 df-br 5103 df-opab 5167 df-id 5545 df-xp 5656 df-rel 5657 df-cnv 5658 df-co 5659 df-dm 5660 df-iota 6494 df-fun 6540 df-fv 6546 |
| This theorem is used by: fvsn 7186 fvsnun1 7187 fsnunfv 7192 fvpr1g 7195 fsnex 7291 suppsnop 8198 mapsnend 9067 enfixsn 9108 axdc3lem4 10534 fseq1p1m1 13735 1fv 13784 s1fv 14762 sumsnf 15914 prodsn 16134 prodsnf 16136 seq1st 16751 vdwlem8 17171 setsid 17390 mgm1 18841 sgrp1 18923 mnd1 18978 mnd1id 18979 gsumws1 19039 grp1 19262 dprdsn 20257 ring1 20546 ixpsnbasval 21488 frgpcyg 21884 mat1dimscm 22795 mat1dimmul 22796 mat1rhmelval 22800 m1detdiag 22917 pt1hmeo 24130 noextenddif 28030 noextendlt 28031 noextendgt 28032 1loopgrvd0 30090 1hevtxdg0 30091 1hevtxdg1 30092 1egrvtxdg1 30095 wlkl0 30973 0mplrim 34192 selvply1rhmlemb 34197 actfunsnrndisj 35280 reprsuc 35290 breprexplema 35305 cvmliftlem7 36142 cvmliftlem13 36147 bj-fununsn2 38268 sticksstones9 43297 sticksstones11 43299 frlmsnic 43697 sumsnd 46136 ovnovollem1 47759 nnsum3primesprm 48981 lincvalsng 49621 snlindsntorlem 49675 lmod1lem2 49693 lmod1lem3 49694 0aryfvalelfv 49840 1arympt1fv 49844 ovsng 50062 |
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