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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 4089 |
. . . . . 6
| |
| 2 | elopab 4352 |
. . . . . 6
| |
| 3 | 1, 2 | bitri 184 |
. . . . 5
|
| 4 | exsimpl 1665 |
. . . . . 6
| |
| 5 | 4 | eximi 1648 |
. . . . 5
|
| 6 | 3, 5 | sylbi 121 |
. . . 4
|
| 7 | vex 2805 |
. . . . . . . 8
| |
| 8 | vex 2805 |
. . . . . . . 8
| |
| 9 | 7, 8 | opth 4329 |
. . . . . . 7
|
| 10 | 9 | biimpi 120 |
. . . . . 6
|
| 11 | 10 | eqcoms 2234 |
. . . . 5
|
| 12 | 11 | 2eximi 1649 |
. . . 4
|
| 13 | 6, 12 | syl 14 |
. . 3
|
| 14 | eeanv 1985 |
. . 3
| |
| 15 | 13, 14 | sylib 122 |
. 2
|
| 16 | isset 2809 |
. . 3
| |
| 17 | isset 2809 |
. . 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 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-14 2205 ax-ext 2213 ax-sep 4207 ax-pow 4264 ax-pr 4299 |
| This theorem depends on definitions: df-bi 117 df-3an 1006 df-tru 1400 df-nf 1509 df-sb 1811 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2363 df-v 2804 df-un 3204 df-in 3206 df-ss 3213 df-pw 3654 df-sn 3675 df-pr 3676 df-op 3678 df-br 4089 df-opab 4151 |
| This theorem is referenced by: (None) |
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