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Mirrors > Home > ILE Home > Th. List > nd5 | Unicode version |
Description: A lemma for proving conditionless ZFC axioms. (Contributed by NM, 8-Jan-2002.) |
Ref | Expression |
---|---|
nd5 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | dveeq2 1802 | . 2 | |
2 | 1 | nalequcoms 1504 | 1 |
Colors of variables: wff set class |
Syntax hints: wn 3 wi 4 wal 1340 wceq 1342 |
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 604 ax-in2 605 ax-io 699 ax-5 1434 ax-7 1435 ax-gen 1436 ax-ie1 1480 ax-ie2 1481 ax-8 1491 ax-10 1492 ax-11 1493 ax-i12 1494 ax-4 1497 ax-17 1513 ax-i9 1517 ax-ial 1521 |
This theorem depends on definitions: df-bi 116 df-nf 1448 df-sb 1750 |
This theorem is referenced by: (None) |
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