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Mirrors > Home > MPE Home > Th. List > exmo | Structured version Visualization version Unicode version |
Description: Something exists or at most one exists. (Contributed by NM, 8-Mar-1995.) |
Ref | Expression |
---|---|
exmo |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | pm2.21 112 |
. . 3
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2 | df-mo 2303 |
. . 3
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3 | 1, 2 | sylibr 216 |
. 2
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4 | 3 | orri 378 |
1
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Colors of variables: wff setvar class |
Syntax hints: ![]() ![]() ![]() ![]() ![]() ![]() |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 |
This theorem depends on definitions: df-bi 189 df-or 372 df-mo 2303 |
This theorem is referenced by: exmoeu 2330 moanim 2357 moexex 2369 mo2icl 3216 mosubopt 4698 dff3 6033 brdom3 8953 mof 31063 |
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