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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 |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-br 3788 |
. . . . . 6
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2 | elopab 4015 |
. . . . . 6
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3 | 1, 2 | bitri 182 |
. . . . 5
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4 | exsimpl 1549 |
. . . . . 6
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5 | 4 | eximi 1532 |
. . . . 5
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6 | 3, 5 | sylbi 119 |
. . . 4
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7 | vex 2605 |
. . . . . . . 8
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8 | vex 2605 |
. . . . . . . 8
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9 | 7, 8 | opth 3994 |
. . . . . . 7
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10 | 9 | biimpi 118 |
. . . . . 6
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11 | 10 | eqcoms 2085 |
. . . . 5
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12 | 11 | 2eximi 1533 |
. . . 4
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13 | 6, 12 | syl 14 |
. . 3
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14 | eeanv 1849 |
. . 3
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15 | 13, 14 | sylib 120 |
. 2
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16 | isset 2606 |
. . 3
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17 | isset 2606 |
. . 3
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18 | 16, 17 | anbi12i 448 |
. 2
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19 | 15, 18 | sylibr 132 |
1
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Colors of variables: wff set class |
Syntax hints: ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 104 ax-ia2 105 ax-ia3 106 ax-io 663 ax-5 1377 ax-7 1378 ax-gen 1379 ax-ie1 1423 ax-ie2 1424 ax-8 1436 ax-10 1437 ax-11 1438 ax-i12 1439 ax-bndl 1440 ax-4 1441 ax-14 1446 ax-17 1460 ax-i9 1464 ax-ial 1468 ax-i5r 1469 ax-ext 2064 ax-sep 3898 ax-pow 3950 ax-pr 3966 |
This theorem depends on definitions: df-bi 115 df-3an 922 df-tru 1288 df-nf 1391 df-sb 1687 df-clab 2069 df-cleq 2075 df-clel 2078 df-nfc 2209 df-v 2604 df-un 2978 df-in 2980 df-ss 2987 df-pw 3386 df-sn 3406 df-pr 3407 df-op 3409 df-br 3788 df-opab 3842 |
This theorem is referenced by: (None) |
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