Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
Mirrors > Home > ILE Home > Th. List > brabvv | Unicode version |
Description: If two classes are in a relationship given by an ordered-pair class abstraction, the classes are sets. (Contributed by Jim Kingdon, 16-Jan-2019.) |
Ref | Expression |
---|---|
brabvv |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-br 3983 | . . . . . 6 | |
2 | elopab 4236 | . . . . . 6 | |
3 | 1, 2 | bitri 183 | . . . . 5 |
4 | exsimpl 1605 | . . . . . 6 | |
5 | 4 | eximi 1588 | . . . . 5 |
6 | 3, 5 | sylbi 120 | . . . 4 |
7 | vex 2729 | . . . . . . . 8 | |
8 | vex 2729 | . . . . . . . 8 | |
9 | 7, 8 | opth 4215 | . . . . . . 7 |
10 | 9 | biimpi 119 | . . . . . 6 |
11 | 10 | eqcoms 2168 | . . . . 5 |
12 | 11 | 2eximi 1589 | . . . 4 |
13 | 6, 12 | syl 14 | . . 3 |
14 | eeanv 1920 | . . 3 | |
15 | 13, 14 | sylib 121 | . 2 |
16 | isset 2732 | . . 3 | |
17 | isset 2732 | . . 3 | |
18 | 16, 17 | anbi12i 456 | . 2 |
19 | 15, 18 | sylibr 133 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wa 103 wceq 1343 wex 1480 wcel 2136 cvv 2726 cop 3579 class class class wbr 3982 copab 4042 |
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 1435 ax-7 1436 ax-gen 1437 ax-ie1 1481 ax-ie2 1482 ax-8 1492 ax-10 1493 ax-11 1494 ax-i12 1495 ax-bndl 1497 ax-4 1498 ax-17 1514 ax-i9 1518 ax-ial 1522 ax-i5r 1523 ax-14 2139 ax-ext 2147 ax-sep 4100 ax-pow 4153 ax-pr 4187 |
This theorem depends on definitions: df-bi 116 df-3an 970 df-tru 1346 df-nf 1449 df-sb 1751 df-clab 2152 df-cleq 2158 df-clel 2161 df-nfc 2297 df-v 2728 df-un 3120 df-in 3122 df-ss 3129 df-pw 3561 df-sn 3582 df-pr 3583 df-op 3585 df-br 3983 df-opab 4044 |
This theorem is referenced by: (None) |
Copyright terms: Public domain | W3C validator |