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Mirrors > Home > MPE Home > Th. List > dftr5 | Unicode version |
Description: An alternate way of defining a transitive class. (Contributed by NM, 20-Mar-2004.) |
Ref | Expression |
---|---|
dftr5 |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | dftr2 4272 |
. 2
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2 | alcom 1748 |
. . 3
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3 | impexp 434 |
. . . . . . . 8
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4 | 3 | albii 1572 |
. . . . . . 7
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5 | df-ral 2679 |
. . . . . . 7
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6 | 4, 5 | bitr4i 244 |
. . . . . 6
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7 | r19.21v 2761 |
. . . . . 6
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8 | 6, 7 | bitri 241 |
. . . . 5
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9 | 8 | albii 1572 |
. . . 4
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10 | df-ral 2679 |
. . . 4
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11 | 9, 10 | bitr4i 244 |
. . 3
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12 | 2, 11 | bitri 241 |
. 2
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13 | 1, 12 | bitri 241 |
1
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Colors of variables: wff set class |
Syntax hints: ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
This theorem is referenced by: dftr3 4274 smobeth 8425 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-3 7 ax-mp 8 ax-gen 1552 ax-5 1563 ax-17 1623 ax-9 1662 ax-8 1683 ax-6 1740 ax-7 1745 ax-11 1757 ax-12 1946 ax-ext 2393 |
This theorem depends on definitions: df-bi 178 df-an 361 df-tru 1325 df-ex 1548 df-nf 1551 df-sb 1656 df-clab 2399 df-cleq 2405 df-clel 2408 df-nfc 2537 df-ral 2679 df-v 2926 df-in 3295 df-ss 3302 df-uni 3984 df-tr 4271 |
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