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Mirrors > Home > ILE Home > Th. List > df-fal | Unicode version |
Description: Definition of the truth
value "false", or "falsum", denoted by ![]() |
Ref | Expression |
---|---|
df-fal |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | wfal 1358 |
. 2
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2 | wtru 1354 |
. . 3
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3 | 2 | wn 3 |
. 2
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4 | 1, 3 | wb 105 |
1
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Colors of variables: wff set class |
This definition is referenced by: fal 1360 nottru 1413 bdfal 14207 |
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