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Mirrors > Home > ILE Home > Th. List > exrot4 | Unicode version |
Description: Rotate existential quantifiers twice. (Contributed by NM, 9-Mar-1995.) |
Ref | Expression |
---|---|
exrot4 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | excom13 1619 | . . 3 | |
2 | 1 | exbii 1536 | . 2 |
3 | excom13 1619 | . 2 | |
4 | 2, 3 | bitri 182 | 1 |
Colors of variables: wff set class |
Syntax hints: wb 103 wex 1421 |
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-5 1376 ax-7 1377 ax-gen 1378 ax-ie1 1422 ax-ie2 1423 ax-4 1440 ax-ial 1467 |
This theorem depends on definitions: df-bi 115 |
This theorem is referenced by: ee8anv 1851 elvvv 4421 dfoprab2 5572 xpassen 6327 enq0sym 6622 |
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