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Mirrors > Home > NFE Home > Th. List > falnanfal | Unicode version |
Description: A ![]() |
Ref | Expression |
---|---|
falnanfal |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nannot 1293 |
. 2
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2 | notfal 1349 |
. 2
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3 | 1, 2 | bitr3i 242 |
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 177 df-an 360 df-nan 1288 df-tru 1319 df-fal 1320 |
This theorem is referenced by: (None) |
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