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Mirrors > Home > ILE Home > Th. List > a7s | Unicode version |
Description: Swap quantifiers in an antecedent. (Contributed by NM, 5-Aug-1993.) |
Ref | Expression |
---|---|
a7s.1 |
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Ref | Expression |
---|---|
a7s |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ax-7 1392 |
. 2
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2 | a7s.1 |
. 2
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3 | 1, 2 | syl 14 |
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-7 1392 |
This theorem is referenced by: cbv2h 1692 hbsb4t 1949 mor 2002 |
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