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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 4622 | . 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 4583 〈cop 4589 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 4584 df-pr 4586 df-op 4590 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 8195 mapsnend 9064 enfixsn 9105 axdc3lem4 10531 fseq1p1m1 13732 1fv 13781 s1fv 14758 sumsnf 15909 prodsn 16129 prodsnf 16131 seq1st 16746 vdwlem8 17166 setsid 17385 mgm1 18836 sgrp1 18918 mnd1 18973 mnd1id 18974 gsumws1 19034 grp1 19257 dprdsn 20252 ring1 20541 ixpsnbasval 21483 frgpcyg 21879 mat1dimscm 22790 mat1dimmul 22791 mat1rhmelval 22795 m1detdiag 22912 pt1hmeo 24125 noextenddif 28025 noextendlt 28026 noextendgt 28027 1loopgrvd0 30085 1hevtxdg0 30086 1hevtxdg1 30087 1egrvtxdg1 30090 wlkl0 30968 0mplrim 34146 selvply1rhmlemb 34151 actfunsnrndisj 35234 reprsuc 35244 breprexplema 35259 cvmliftlem7 36056 cvmliftlem13 36061 bj-fununsn2 38176 sticksstones9 43205 sticksstones11 43207 frlmsnic 43605 sumsnd 46043 ovnovollem1 47666 nnsum3primesprm 48888 lincvalsng 49528 snlindsntorlem 49582 lmod1lem2 49600 lmod1lem3 49601 0aryfvalelfv 49747 1arympt1fv 49751 ovsng 49968 |
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