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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 |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | excom13 1625 |
. . 3
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2 | 1 | exbii 1542 |
. 2
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3 | excom13 1625 |
. 2
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4 | 2, 3 | bitri 183 |
1
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Colors of variables: wff set class |
Syntax hints: ![]() ![]() |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-5 1382 ax-7 1383 ax-gen 1384 ax-ie1 1428 ax-ie2 1429 ax-4 1446 ax-ial 1473 |
This theorem depends on definitions: df-bi 116 |
This theorem is referenced by: ee8anv 1859 elvvv 4516 dfoprab2 5712 xpassen 6602 enq0sym 7054 |
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