| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| 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 6594 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → Fun {〈𝐴, 𝐵〉}) | |
| 2 | opex 5450 | . . 3 ⊢ 〈𝐴, 𝐵〉 ∈ V | |
| 3 | 2 | snid 4633 | . 2 ⊢ 〈𝐴, 𝐵〉 ∈ {〈𝐴, 𝐵〉} |
| 4 | funopfv 6937 | . 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 2146 {csn 4594 〈cop 4600 Fun wfun 6537 ‘cfv 6543 |
| 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 1943 ax-6 2000 ax-7 2041 ax-8 2148 ax-9 2156 ax-10 2179 ax-12 2216 ax-ext 2738 ax-sep 5262 ax-pr 5409 |
| 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 2100 df-mo 2570 df-eu 2600 df-clab 2745 df-cleq 2758 df-clel 2841 df-ral 3083 df-rex 3093 df-rab 3420 df-v 3460 df-dif 3911 df-un 3913 df-in 3915 df-ss 3925 df-nul 4290 df-if 4493 df-sn 4595 df-pr 4597 df-op 4601 df-uni 4878 df-br 5115 df-opab 5179 df-id 5561 df-xp 5672 df-rel 5673 df-cnv 5674 df-co 5675 df-dm 5676 df-iota 6499 df-fun 6545 df-fv 6551 |
| This theorem is used by: fvsn 7186 fvsnun1 7187 fsnunfv 7192 fvpr1g 7195 fsnex 7292 suppsnop 8183 mapsnend 9043 enfixsn 9084 axdc3lem4 10455 fseq1p1m1 13645 1fv 13694 s1fv 14670 sumsnf 15820 prodsn 16042 prodsnf 16044 seq1st 16654 vdwlem8 17073 setsid 17292 mgm1 18741 sgrp1 18816 mnd1 18868 mnd1id 18869 gsumws1 18928 grp1 19144 dprdsn 20139 ring1 20426 ixpsnbasval 21366 frgpcyg 21760 mat1dimscm 22669 mat1dimmul 22670 mat1rhmelval 22674 m1detdiag 22791 pt1hmeo 24000 noextenddif 27869 noextendlt 27870 noextendgt 27871 1loopgrvd0 29891 1hevtxdg0 29892 1hevtxdg1 29893 1egrvtxdg1 29896 wlkl0 30755 0mplrim 33935 selvply1rhmlemb 33940 actfunsnrndisj 35024 reprsuc 35034 breprexplema 35049 cvmliftlem7 35804 cvmliftlem13 35809 bj-fununsn2 37939 sticksstones9 42962 sticksstones11 42964 frlmsnic 43349 sumsnd 45787 ovnovollem1 47411 nnsum3primesprm 48596 lincvalsng 49237 snlindsntorlem 49291 lmod1lem2 49309 lmod1lem3 49310 0aryfvalelfv 49456 1arympt1fv 49460 ovsng 49677 |
| Copyright terms: Public domain | W3C validator |