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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 6576 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → Fun {〈𝐴, 𝐵〉}) | |
| 2 | opex 5436 | . . 3 ⊢ 〈𝐴, 𝐵〉 ∈ V | |
| 3 | 2 | snid 4624 | . 2 ⊢ 〈𝐴, 𝐵〉 ∈ {〈𝐴, 𝐵〉} |
| 4 | funopfv 6920 | . 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 |
| Syntax hints: → wi 4 ∧ wa 400 = wceq 1563 ∈ wcel 2145 {csn 4585 〈cop 4591 Fun wfun 6519 ‘cfv 6525 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1818 ax-4 1832 ax-5 1933 ax-6 1990 ax-7 2031 ax-8 2147 ax-9 2155 ax-10 2178 ax-12 2215 ax-ext 2737 ax-sep 5251 ax-pr 5395 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1103 df-tru 1566 df-fal 1576 df-ex 1803 df-nf 1807 df-sb 2094 df-mo 2569 df-eu 2599 df-clab 2744 df-cleq 2757 df-clel 2840 df-ral 3080 df-rex 3090 df-rab 3418 df-v 3459 df-dif 3910 df-un 3912 df-in 3914 df-ss 3924 df-nul 4289 df-if 4484 df-sn 4586 df-pr 4588 df-op 4592 df-uni 4869 df-br 5106 df-opab 5168 df-id 5547 df-xp 5658 df-rel 5659 df-cnv 5660 df-co 5661 df-dm 5662 df-iota 6481 df-fun 6527 df-fv 6533 |
| This theorem is referenced by: fvsn 7169 fvsnun1 7170 fsnunfv 7175 fvpr1g 7178 fsnex 7271 suppsnop 8162 mapsnend 9021 enfixsn 9062 axdc3lem4 10425 fseq1p1m1 13617 1fv 13666 s1fv 14638 sumsnf 15784 prodsn 16006 prodsnf 16008 seq1st 16619 vdwlem8 17038 setsid 17257 mgm1 18706 sgrp1 18777 mnd1 18827 mnd1id 18828 gsumws1 18887 grp1 19104 dprdsn 20099 ring1 20384 ixpsnbasval 21298 frgpcyg 21683 mat1dimscm 22593 mat1dimmul 22594 mat1rhmelval 22598 m1detdiag 22715 pt1hmeo 23924 noextenddif 27790 noextendlt 27791 noextendgt 27792 1loopgrvd0 29763 1hevtxdg0 29764 1hevtxdg1 29765 1egrvtxdg1 29768 wlkl0 30627 0mplrim 33821 selvply1rhmlemb 33826 actfunsnrndisj 34909 reprsuc 34919 breprexplema 34934 cvmliftlem7 35654 cvmliftlem13 35659 bj-fununsn2 37758 sticksstones9 42783 sticksstones11 42785 frlmsnic 43170 sumsnd 45604 ovnovollem1 47228 nnsum3primesprm 48410 lincvalsng 49047 snlindsntorlem 49101 lmod1lem2 49119 lmod1lem3 49120 0aryfvalelfv 49266 1arympt1fv 49270 ovsng 49487 |
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