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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 6589 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → Fun {〈𝐴, 𝐵〉}) | |
| 2 | opex 5447 | . . 3 ⊢ 〈𝐴, 𝐵〉 ∈ V | |
| 3 | 2 | snid 4629 | . 2 ⊢ 〈𝐴, 𝐵〉 ∈ {〈𝐴, 𝐵〉} |
| 4 | funopfv 6932 | . 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 1570 ∈ wcel 2143 {csn 4590 〈cop 4596 Fun wfun 6532 ‘cfv 6538 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-10 2176 ax-12 2213 ax-ext 2735 ax-sep 5258 ax-pr 5406 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-nf 1814 df-sb 2097 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-ral 3080 df-rex 3090 df-rab 3417 df-v 3457 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-nul 4288 df-if 4489 df-sn 4591 df-pr 4593 df-op 4597 df-uni 4874 df-br 5111 df-opab 5175 df-id 5558 df-xp 5669 df-rel 5670 df-cnv 5671 df-co 5672 df-dm 5673 df-iota 6494 df-fun 6540 df-fv 6546 |
| This theorem is referenced by: fvsn 7181 fvsnun1 7182 fsnunfv 7187 fvpr1g 7190 fsnex 7283 suppsnop 8175 mapsnend 9034 enfixsn 9075 axdc3lem4 10438 fseq1p1m1 13628 1fv 13677 s1fv 14650 sumsnf 15796 prodsn 16018 prodsnf 16020 seq1st 16630 vdwlem8 17049 setsid 17268 mgm1 18717 sgrp1 18788 mnd1 18838 mnd1id 18839 gsumws1 18898 grp1 19114 dprdsn 20109 ring1 20394 ixpsnbasval 21310 frgpcyg 21704 mat1dimscm 22613 mat1dimmul 22614 mat1rhmelval 22618 m1detdiag 22735 pt1hmeo 23944 noextenddif 27810 noextendlt 27811 noextendgt 27812 1loopgrvd0 29832 1hevtxdg0 29833 1hevtxdg1 29834 1egrvtxdg1 29837 wlkl0 30696 0mplrim 33882 selvply1rhmlemb 33887 actfunsnrndisj 34970 reprsuc 34980 breprexplema 34995 cvmliftlem7 35761 cvmliftlem13 35766 bj-fununsn2 37876 sticksstones9 42899 sticksstones11 42901 frlmsnic 43288 sumsnd 45726 ovnovollem1 47350 nnsum3primesprm 48532 lincvalsng 49173 snlindsntorlem 49227 lmod1lem2 49245 lmod1lem3 49246 0aryfvalelfv 49392 1arympt1fv 49396 ovsng 49613 |
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