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Mirrors > Home > ILE Home > Th. List > funinsn | Unicode version |
Description: A function based on the singleton of an ordered pair. Unlike funsng 5169, this holds even if or is a proper class. (Contributed by Jim Kingdon, 17-Apr-2022.) |
Ref | Expression |
---|---|
funinsn |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | inss2 3297 | . . . 4 | |
2 | xpss 4647 | . . . 4 | |
3 | 1, 2 | sstri 3106 | . . 3 |
4 | df-rel 4546 | . . 3 | |
5 | 3, 4 | mpbir 145 | . 2 |
6 | elin 3259 | . . . . . . . . 9 | |
7 | 6 | simplbi 272 | . . . . . . . 8 |
8 | elsni 3545 | . . . . . . . 8 | |
9 | 7, 8 | syl 14 | . . . . . . 7 |
10 | vex 2689 | . . . . . . . 8 | |
11 | vex 2689 | . . . . . . . 8 | |
12 | 10, 11 | opth 4159 | . . . . . . 7 |
13 | 9, 12 | sylib 121 | . . . . . 6 |
14 | 13 | simprd 113 | . . . . 5 |
15 | elin 3259 | . . . . . . . . 9 | |
16 | 15 | simplbi 272 | . . . . . . . 8 |
17 | elsni 3545 | . . . . . . . 8 | |
18 | 16, 17 | syl 14 | . . . . . . 7 |
19 | vex 2689 | . . . . . . . 8 | |
20 | 10, 19 | opth 4159 | . . . . . . 7 |
21 | 18, 20 | sylib 121 | . . . . . 6 |
22 | 21 | simprd 113 | . . . . 5 |
23 | eqtr3 2159 | . . . . 5 | |
24 | 14, 22, 23 | syl2an 287 | . . . 4 |
25 | 24 | gen2 1426 | . . 3 |
26 | 25 | ax-gen 1425 | . 2 |
27 | dffun4 5134 | . 2 | |
28 | 5, 26, 27 | mpbir2an 926 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wa 103 wal 1329 wceq 1331 wcel 1480 cvv 2686 cin 3070 wss 3071 csn 3527 cop 3530 cxp 4537 wrel 4544 wfun 5117 |
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 698 ax-5 1423 ax-7 1424 ax-gen 1425 ax-ie1 1469 ax-ie2 1470 ax-8 1482 ax-10 1483 ax-11 1484 ax-i12 1485 ax-bndl 1486 ax-4 1487 ax-14 1492 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-ext 2121 ax-sep 4046 ax-pow 4098 ax-pr 4131 |
This theorem depends on definitions: df-bi 116 df-3an 964 df-tru 1334 df-nf 1437 df-sb 1736 df-eu 2002 df-mo 2003 df-clab 2126 df-cleq 2132 df-clel 2135 df-nfc 2270 df-ral 2421 df-v 2688 df-un 3075 df-in 3077 df-ss 3084 df-pw 3512 df-sn 3533 df-pr 3534 df-op 3536 df-br 3930 df-opab 3990 df-id 4215 df-xp 4545 df-rel 4546 df-cnv 4547 df-co 4548 df-fun 5125 |
This theorem is referenced by: (None) |
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