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| 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 4035 |
. . . . . 6
| |
| 2 | elopab 4293 |
. . . . . 6
| |
| 3 | 1, 2 | bitri 184 |
. . . . 5
|
| 4 | exsimpl 1631 |
. . . . . 6
| |
| 5 | 4 | eximi 1614 |
. . . . 5
|
| 6 | 3, 5 | sylbi 121 |
. . . 4
|
| 7 | vex 2766 |
. . . . . . . 8
| |
| 8 | vex 2766 |
. . . . . . . 8
| |
| 9 | 7, 8 | opth 4271 |
. . . . . . 7
|
| 10 | 9 | biimpi 120 |
. . . . . 6
|
| 11 | 10 | eqcoms 2199 |
. . . . 5
|
| 12 | 11 | 2eximi 1615 |
. . . 4
|
| 13 | 6, 12 | syl 14 |
. . 3
|
| 14 | eeanv 1951 |
. . 3
| |
| 15 | 13, 14 | sylib 122 |
. 2
|
| 16 | isset 2769 |
. . 3
| |
| 17 | isset 2769 |
. . 3
| |
| 18 | 16, 17 | anbi12i 460 |
. 2
|
| 19 | 15, 18 | sylibr 134 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 710 ax-5 1461 ax-7 1462 ax-gen 1463 ax-ie1 1507 ax-ie2 1508 ax-8 1518 ax-10 1519 ax-11 1520 ax-i12 1521 ax-bndl 1523 ax-4 1524 ax-17 1540 ax-i9 1544 ax-ial 1548 ax-i5r 1549 ax-14 2170 ax-ext 2178 ax-sep 4152 ax-pow 4208 ax-pr 4243 |
| This theorem depends on definitions: df-bi 117 df-3an 982 df-tru 1367 df-nf 1475 df-sb 1777 df-clab 2183 df-cleq 2189 df-clel 2192 df-nfc 2328 df-v 2765 df-un 3161 df-in 3163 df-ss 3170 df-pw 3608 df-sn 3629 df-pr 3630 df-op 3632 df-br 4035 df-opab 4096 |
| This theorem is referenced by: (None) |
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