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Mirrors > Home > MPE Home > Th. List > Mathboxes > notbinot2 | Structured version Visualization version Unicode version |
Description: Commutation rule between negation and biimplication. (Contributed by Giovanni Mascellani, 15-Sep-2017.) |
Ref | Expression |
---|---|
notbinot2 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nbbn 373 | . 2 | |
2 | 1 | bicomi 214 | 1 |
Colors of variables: wff setvar class |
Syntax hints: wn 3 wb 196 |
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 197 |
This theorem is referenced by: biimpor 33883 |
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