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Mirrors > Home > ILE Home > Th. List > drex2 | Unicode version |
Description: Formula-building lemma for use with the Distinctor Reduction Theorem. Part of Theorem 9.4 of [Megill] p. 448 (p. 16 of preprint). (Contributed by NM, 27-Feb-2005.) |
Ref | Expression |
---|---|
drex2.1 |
Ref | Expression |
---|---|
drex2 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | hbae 1696 | . 2 | |
2 | drex2.1 | . 2 | |
3 | 1, 2 | exbidh 1593 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wb 104 wal 1329 wex 1468 |
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-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-4 1487 ax-17 1506 ax-i9 1510 ax-ial 1514 |
This theorem depends on definitions: df-bi 116 |
This theorem is referenced by: exdistrfor 1772 |
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