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Mirrors > Home > ILE Home > Th. List > raldifb | Unicode version |
Description: Restricted universal quantification on a class difference in terms of an implication. (Contributed by Alexander van der Vekens, 3-Jan-2018.) |
Ref | Expression |
---|---|
raldifb |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | impexp 261 | . . . 4 | |
2 | 1 | bicomi 131 | . . 3 |
3 | df-nel 2402 | . . . . . 6 | |
4 | 3 | anbi2i 452 | . . . . 5 |
5 | eldif 3075 | . . . . . 6 | |
6 | 5 | bicomi 131 | . . . . 5 |
7 | 4, 6 | bitri 183 | . . . 4 |
8 | 7 | imbi1i 237 | . . 3 |
9 | 2, 8 | bitri 183 | . 2 |
10 | 9 | ralbii2 2443 | 1 |
Colors of variables: wff set class |
Syntax hints: wn 3 wi 4 wa 103 wb 104 wcel 1480 wnel 2401 wral 2414 cdif 3063 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 603 ax-in2 604 ax-io 698 ax-5 1423 ax-7 1424 ax-gen 1425 ax-ie1 1469 ax-ie2 1470 ax-8 1482 ax-10 1483 ax-11 1484 ax-i12 1485 ax-bndl 1486 ax-4 1487 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-ext 2119 |
This theorem depends on definitions: df-bi 116 df-tru 1334 df-nf 1437 df-sb 1736 df-clab 2124 df-cleq 2130 df-clel 2133 df-nfc 2268 df-nel 2402 df-ral 2419 df-v 2683 df-dif 3068 |
This theorem is referenced by: (None) |
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