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Mirrors > Home > ILE Home > Th. List > dveel1 | Unicode version |
Description: Quantifier introduction when one pair of variables is distinct. (Contributed by NM, 2-Jan-2002.) |
Ref | Expression |
---|---|
dveel1 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ax-17 1459 | . 2 | |
2 | ax-17 1459 | . 2 | |
3 | elequ1 1640 | . 2 | |
4 | 1, 2, 3 | dvelimf 1932 | 1 |
Colors of variables: wff set class |
Syntax hints: wn 3 wi 4 wal 1282 |
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-in2 577 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-13 1444 ax-17 1459 ax-i9 1463 ax-ial 1467 ax-i5r 1468 |
This theorem depends on definitions: df-bi 115 df-nf 1390 df-sb 1686 |
This theorem is referenced by: (None) |
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