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Mirrors > Home > ILE Home > Th. List > equsb3lem | Unicode version |
Description: Lemma for equsb3 1825. (Contributed by NM, 4-Dec-2005.) (Proof shortened by Andrew Salmon, 14-Jun-2011.) |
Ref | Expression |
---|---|
equsb3lem |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ax-17 1419 | . 2 | |
2 | equequ1 1598 | . 2 | |
3 | 1, 2 | sbieh 1673 | 1 |
Colors of variables: wff set class |
Syntax hints: wb 98 wceq 1243 wsb 1645 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 99 ax-ia2 100 ax-ia3 101 ax-5 1336 ax-gen 1338 ax-ie1 1382 ax-ie2 1383 ax-8 1395 ax-4 1400 ax-17 1419 ax-i9 1423 ax-ial 1427 |
This theorem depends on definitions: df-bi 110 df-sb 1646 |
This theorem is referenced by: equsb3 1825 |
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