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Mirrors > Home > ILE Home > Th. List > unopab | Unicode version |
Description: Union of two ordered pair class abstractions. (Contributed by NM, 30-Sep-2002.) |
Ref | Expression |
---|---|
unopab |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | unab 3231 |
. . 3
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2 | 19.43 1559 |
. . . . 5
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3 | andi 764 |
. . . . . . . 8
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4 | 3 | exbii 1536 |
. . . . . . 7
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5 | 19.43 1559 |
. . . . . . 7
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6 | 4, 5 | bitr2i 183 |
. . . . . 6
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7 | 6 | exbii 1536 |
. . . . 5
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8 | 2, 7 | bitr3i 184 |
. . . 4
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9 | 8 | abbii 2194 |
. . 3
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10 | 1, 9 | eqtri 2101 |
. 2
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11 | df-opab 3840 |
. . 3
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12 | df-opab 3840 |
. . 3
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13 | 11, 12 | uneq12i 3124 |
. 2
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14 | df-opab 3840 |
. 2
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15 | 10, 13, 14 | 3eqtr4i 2111 |
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 662 ax-5 1376 ax-7 1377 ax-gen 1378 ax-ie1 1422 ax-ie2 1423 ax-8 1435 ax-10 1436 ax-11 1437 ax-i12 1438 ax-bndl 1439 ax-4 1440 ax-17 1459 ax-i9 1463 ax-ial 1467 ax-i5r 1468 ax-ext 2063 |
This theorem depends on definitions: df-bi 115 df-tru 1287 df-nf 1390 df-sb 1686 df-clab 2068 df-cleq 2074 df-clel 2077 df-nfc 2208 df-v 2603 df-un 2977 df-opab 3840 |
This theorem is referenced by: xpundi 4414 xpundir 4415 cnvun 4749 coundi 4842 coundir 4843 mptun 5049 |
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