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Mirrors > Home > NFE Home > Th. List > nic-bijust | Unicode version |
Description: For nic-* definitions, the biconditional connective is not used. Instead, definitions are made based on this form. nic-bi1 1453 and nic-bi2 1454 are used to convert the definitions into usable theorems about one side of the implication. (Contributed by Jeff Hoffman, 18-Nov-2007.) (Proof modification is discouraged.) (New usage is discouraged.) |
Ref | Expression |
---|---|
nic-bijust |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nic-swap 1444 | 1 |
Colors of variables: wff setvar class |
Syntax hints: wnan 1287 |
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 |
This theorem is referenced by: (None) |
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