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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 6613 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → Fun {〈𝐴, 𝐵〉}) | |
| 2 | opex 5436 | . . 3 ⊢ 〈𝐴, 𝐵〉 ∈ V | |
| 3 | 2 | snid 4623 | . 2 ⊢ 〈𝐴, 𝐵〉 ∈ {〈𝐴, 𝐵〉} |
| 4 | funopfv 6957 | . 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 1570 ∈ wcel 2147 {csn 4588 〈cop 4838 Fun wfun 6552 ‘cfv 6558 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-10 2180 ax-12 2216 ax-ext 2735 ax-sep 5252 ax-pr 5395 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2102 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-ral 3081 df-rex 3091 df-rab 3417 df-v 3456 df-ss 3901 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-sn 4589 df-pr 4591 df-op 4839 df-uni 4871 df-br 5107 df-opab 5171 df-id 5550 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-iota 6512 df-fun 6560 df-fv 6566 |
| This theorem is used by: fvsn 7209 fvsnun1 7210 fsnunfv 7215 fvpr1g 7218 fsnex 7314 suppsnop 8223 mapsnend 9092 enfixsn 9133 axdc3lem4 10558 fseq1p1m1 13759 1fv 13808 s1fv 14786 sumsnf 15938 prodsn 16158 prodsnf 16160 seq1st 16775 vdwlem8 17195 setsid 17414 mgm1 18865 sgrp1 18947 mnd1 19002 mnd1id 19003 gsumws1 19063 grp1 19286 dprdsn 20282 ring1 20571 ixpsnbasval 21513 frgpcyg 21909 mat1dimscm 22820 mat1dimmul 22821 mat1rhmelval 22825 m1detdiag 22942 pt1hmeo 24155 noextenddif 28055 noextendlt 28056 noextendgt 28057 1loopgrvd0 30115 1hevtxdg0 30116 1hevtxdg1 30117 1egrvtxdg1 30120 wlkl0 30998 0mplrim 34216 selvply1rhmlemb 34221 actfunsnrndisj 35304 reprsuc 35314 breprexplema 35329 cvmliftlem7 36223 cvmliftlem13 36228 bj-fununsn2 38367 sticksstones9 43396 sticksstones11 43398 frlmsnic 43797 sumsnd 46248 ovnovollem1 47871 nnsum3primesprm 49093 lincvalsng 49733 snlindsntorlem 49787 lmod1lem2 49805 lmod1lem3 49806 0aryfvalelfv 49952 1arympt1fv 49956 ovsng 50174 |
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