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Mirrors > Home > ILE Home > Th. List > 19.21bbi | Unicode version |
Description: Inference removing double quantifier. (Contributed by NM, 20-Apr-1994.) |
Ref | Expression |
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19.21bbi.1 |
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Ref | Expression |
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19.21bbi |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 19.21bbi.1 |
. . 3
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2 | 1 | 19.21bi 1558 |
. 2
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3 | 2 | 19.21bi 1558 |
1
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Colors of variables: wff set class |
Syntax hints: ![]() ![]() |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-4 1510 |
This theorem is referenced by: pocl 4299 funun 5255 fununi 5279 imain 5293 |
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