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Theorem nic-bijust 1452
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

Proof of Theorem nic-bijust
StepHypRef 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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