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Mirrors > Home > ILE Home > Th. List > mobidv | Unicode version |
Description: Formula-building rule for "at most one" quantifier (deduction rule). (Contributed by Mario Carneiro, 7-Oct-2016.) |
Ref | Expression |
---|---|
mobidv.1 |
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Ref | Expression |
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mobidv |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nfv 1462 |
. 2
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2 | mobidv.1 |
. 2
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3 | 1, 2 | mobid 1977 |
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 104 ax-ia2 105 ax-ia3 106 ax-5 1377 ax-gen 1379 ax-ie1 1423 ax-ie2 1424 ax-4 1441 ax-17 1460 ax-ial 1468 |
This theorem depends on definitions: df-bi 115 df-nf 1391 df-eu 1945 df-mo 1946 |
This theorem is referenced by: mobii 1979 mosubopt 4425 dffun6f 4939 funmo 4941 1stconst 5867 2ndconst 5868 |
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