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Mirrors > Home > ILE Home > Th. List > fvsng | Unicode version |
Description: The value of a singleton of an ordered pair is the second member. (Contributed by NM, 26-Oct-2012.) |
Ref | Expression |
---|---|
fvsng |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | opeq1 3752 | . . . . 5 | |
2 | 1 | sneqd 3583 | . . . 4 |
3 | id 19 | . . . 4 | |
4 | 2, 3 | fveq12d 5487 | . . 3 |
5 | 4 | eqeq1d 2173 | . 2 |
6 | opeq2 3753 | . . . . 5 | |
7 | 6 | sneqd 3583 | . . . 4 |
8 | 7 | fveq1d 5482 | . . 3 |
9 | id 19 | . . 3 | |
10 | 8, 9 | eqeq12d 2179 | . 2 |
11 | vex 2724 | . . 3 | |
12 | vex 2724 | . . 3 | |
13 | 11, 12 | fvsn 5674 | . 2 |
14 | 5, 10, 13 | vtocl2g 2785 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wa 103 wceq 1342 wcel 2135 csn 3570 cop 3573 cfv 5182 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-io 699 ax-5 1434 ax-7 1435 ax-gen 1436 ax-ie1 1480 ax-ie2 1481 ax-8 1491 ax-10 1492 ax-11 1493 ax-i12 1494 ax-bndl 1496 ax-4 1497 ax-17 1513 ax-i9 1517 ax-ial 1521 ax-i5r 1522 ax-14 2138 ax-ext 2146 ax-sep 4094 ax-pow 4147 ax-pr 4181 |
This theorem depends on definitions: df-bi 116 df-3an 969 df-tru 1345 df-nf 1448 df-sb 1750 df-eu 2016 df-mo 2017 df-clab 2151 df-cleq 2157 df-clel 2160 df-nfc 2295 df-ral 2447 df-rex 2448 df-v 2723 df-sbc 2947 df-un 3115 df-in 3117 df-ss 3124 df-pw 3555 df-sn 3576 df-pr 3577 df-op 3579 df-uni 3784 df-br 3977 df-opab 4038 df-id 4265 df-xp 4604 df-rel 4605 df-cnv 4606 df-co 4607 df-dm 4608 df-iota 5147 df-fun 5184 df-fv 5190 |
This theorem is referenced by: fsnunfv 5680 fvpr1g 5685 fvpr2g 5686 tfr0dm 6281 fseq1p1m1 10019 1fv 10064 sumsnf 11336 prodsnf 11519 setsslid 12387 |
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