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Mirrors > Home > ILE Home > Th. List > moabs | Unicode version |
Description: Absorption of existence condition by "at most one." (Contributed by NM, 4-Nov-2002.) |
Ref | Expression |
---|---|
moabs |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | pm5.4 238 |
. 2
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2 | df-mo 1904 |
. . 3
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3 | 2 | imbi2i 215 |
. 2
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4 | 1, 3, 2 | 3bitr4ri 202 |
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 99 ax-ia2 100 ax-ia3 101 |
This theorem depends on definitions: df-bi 110 df-mo 1904 |
This theorem is referenced by: mo2icl 2720 dffun7 4928 |
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