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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 6549 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → Fun {〈𝐴, 𝐵〉}) | |
| 2 | opex 5416 | . . 3 ⊢ 〈𝐴, 𝐵〉 ∈ V | |
| 3 | 2 | snid 4606 | . 2 ⊢ 〈𝐴, 𝐵〉 ∈ {〈𝐴, 𝐵〉} |
| 4 | funopfv 6889 | . 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 395 = wceq 1542 ∈ wcel 2114 {csn 4567 〈cop 4573 Fun wfun 6492 ‘cfv 6498 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-12 2185 ax-ext 2708 ax-sep 5231 ax-pr 5375 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2539 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2811 df-ral 3052 df-rex 3062 df-rab 3390 df-v 3431 df-dif 3892 df-un 3894 df-in 3896 df-ss 3906 df-nul 4274 df-if 4467 df-sn 4568 df-pr 4570 df-op 4574 df-uni 4851 df-br 5086 df-opab 5148 df-id 5526 df-xp 5637 df-rel 5638 df-cnv 5639 df-co 5640 df-dm 5641 df-iota 6454 df-fun 6500 df-fv 6506 |
| This theorem is referenced by: fvsn 7136 fvsnun1 7137 fsnunfv 7142 fvpr1g 7145 fsnex 7238 suppsnop 8128 mapsnend 8983 enfixsn 9024 axdc3lem4 10375 fseq1p1m1 13552 1fv 13601 s1fv 14573 sumsnf 15705 prodsn 15927 prodsnf 15929 seq1st 16540 vdwlem8 16959 setsid 17177 mgm1 18626 sgrp1 18697 mnd1 18747 mnd1id 18748 gsumws1 18806 grp1 19023 dprdsn 20013 ring1 20291 ixpsnbasval 21203 frgpcyg 21553 mat1dimscm 22440 mat1dimmul 22441 mat1rhmelval 22445 m1detdiag 22562 pt1hmeo 23771 noextenddif 27632 noextendlt 27633 noextendgt 27634 1loopgrvd0 29573 1hevtxdg0 29574 1hevtxdg1 29575 1egrvtxdg1 29578 wlkl0 30437 actfunsnrndisj 34749 reprsuc 34759 breprexplema 34774 cvmliftlem7 35473 cvmliftlem13 35478 bj-fununsn2 37568 sticksstones9 42593 sticksstones11 42595 frlmsnic 42985 sumsnd 45457 ovnovollem1 47084 nnsum3primesprm 48266 lincvalsng 48892 snlindsntorlem 48946 lmod1lem2 48964 lmod1lem3 48965 0aryfvalelfv 49111 1arympt1fv 49115 ovsng 49333 |
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