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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 6543 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → Fun {〈𝐴, 𝐵〉}) | |
| 2 | opex 5410 | . . 3 ⊢ 〈𝐴, 𝐵〉 ∈ V | |
| 3 | 2 | snid 4601 | . 2 ⊢ 〈𝐴, 𝐵〉 ∈ {〈𝐴, 𝐵〉} |
| 4 | funopfv 6883 | . 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 396 = wceq 1547 ∈ wcel 2119 {csn 4562 〈cop 4568 Fun wfun 6486 ‘cfv 6492 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1974 ax-7 2015 ax-8 2121 ax-9 2129 ax-10 2152 ax-12 2189 ax-ext 2712 ax-sep 5225 ax-pr 5369 |
| This theorem depends on definitions: df-bi 208 df-an 397 df-or 854 df-3an 1094 df-tru 1550 df-fal 1560 df-ex 1787 df-nf 1791 df-sb 2074 df-mo 2543 df-eu 2573 df-clab 2719 df-cleq 2732 df-clel 2815 df-ral 3055 df-rex 3065 df-rab 3393 df-v 3434 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-nul 4269 df-if 4462 df-sn 4563 df-pr 4565 df-op 4569 df-uni 4846 df-br 5080 df-opab 5142 df-id 5520 df-xp 5631 df-rel 5632 df-cnv 5633 df-co 5634 df-dm 5635 df-iota 6448 df-fun 6494 df-fv 6500 |
| This theorem is referenced by: fvsn 7132 fvsnun1 7133 fsnunfv 7138 fvpr1g 7141 fsnex 7234 suppsnop 8125 mapsnend 8980 enfixsn 9021 axdc3lem4 10373 fseq1p1m1 13550 1fv 13599 s1fv 14571 sumsnf 15703 prodsn 15925 prodsnf 15927 seq1st 16538 vdwlem8 16957 setsid 17175 mgm1 18624 sgrp1 18695 mnd1 18745 mnd1id 18746 gsumws1 18804 grp1 19021 dprdsn 20011 ring1 20289 ixpsnbasval 21205 frgpcyg 21555 mat1dimscm 22465 mat1dimmul 22466 mat1rhmelval 22470 m1detdiag 22587 pt1hmeo 23796 noextenddif 27657 noextendlt 27658 noextendgt 27659 1loopgrvd0 29598 1hevtxdg0 29599 1hevtxdg1 29600 1egrvtxdg1 29603 wlkl0 30462 0mplrim 33705 selvply1rhmlemb 33710 actfunsnrndisj 34796 reprsuc 34806 breprexplema 34821 cvmliftlem7 35526 cvmliftlem13 35531 bj-fununsn2 37621 sticksstones9 42646 sticksstones11 42648 frlmsnic 43033 sumsnd 45481 ovnovollem1 47106 nnsum3primesprm 48288 lincvalsng 48914 snlindsntorlem 48968 lmod1lem2 48986 lmod1lem3 48987 0aryfvalelfv 49133 1arympt1fv 49137 ovsng 49355 |
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