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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 6568 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → Fun {〈𝐴, 𝐵〉}) | |
| 2 | opex 5430 | . . 3 ⊢ 〈𝐴, 𝐵〉 ∈ V | |
| 3 | 2 | snid 4620 | . 2 ⊢ 〈𝐴, 𝐵〉 ∈ {〈𝐴, 𝐵〉} |
| 4 | funopfv 6912 | . 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 399 = wceq 1559 ∈ wcel 2141 {csn 4581 〈cop 4587 Fun wfun 6511 ‘cfv 6517 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1814 ax-4 1828 ax-5 1929 ax-6 1986 ax-7 2027 ax-8 2143 ax-9 2151 ax-10 2174 ax-12 2211 ax-ext 2733 ax-sep 5245 ax-pr 5389 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3an 1099 df-tru 1562 df-fal 1572 df-ex 1799 df-nf 1803 df-sb 2090 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-ral 3076 df-rex 3086 df-rab 3414 df-v 3455 df-dif 3907 df-un 3909 df-in 3911 df-ss 3921 df-nul 4286 df-if 4480 df-sn 4582 df-pr 4584 df-op 4588 df-uni 4865 df-br 5100 df-opab 5162 df-id 5540 df-xp 5651 df-rel 5652 df-cnv 5653 df-co 5654 df-dm 5655 df-iota 6473 df-fun 6519 df-fv 6525 |
| This theorem is referenced by: fvsn 7161 fvsnun1 7162 fsnunfv 7167 fvpr1g 7170 fsnex 7263 suppsnop 8153 mapsnend 9013 enfixsn 9054 axdc3lem4 10407 fseq1p1m1 13600 1fv 13649 s1fv 14621 sumsnf 15753 prodsn 15975 prodsnf 15977 seq1st 16588 vdwlem8 17007 setsid 17226 mgm1 18675 sgrp1 18746 mnd1 18796 mnd1id 18797 gsumws1 18855 grp1 19072 dprdsn 20061 ring1 20339 ixpsnbasval 21255 frgpcyg 21605 mat1dimscm 22515 mat1dimmul 22516 mat1rhmelval 22520 m1detdiag 22637 pt1hmeo 23846 noextenddif 27709 noextendlt 27710 noextendgt 27711 1loopgrvd0 29651 1hevtxdg0 29652 1hevtxdg1 29653 1egrvtxdg1 29656 wlkl0 30515 0mplrim 33772 selvply1rhmlemb 33777 actfunsnrndisj 34863 reprsuc 34873 breprexplema 34888 cvmliftlem7 35605 cvmliftlem13 35610 bj-fununsn2 37710 sticksstones9 42735 sticksstones11 42737 frlmsnic 43122 sumsnd 45570 ovnovollem1 47194 nnsum3primesprm 48376 lincvalsng 49002 snlindsntorlem 49056 lmod1lem2 49074 lmod1lem3 49075 0aryfvalelfv 49221 1arympt1fv 49225 ovsng 49443 |
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