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Metamath Proof Explorer

Theorem mulass

Description: Alias for ax-mulass , for naming consistency with mulassi . (Contributed by NM, 10-Mar-2008)

Ref Expression
Assertion mulass 
|- ( ( A e. CC /\ B e. CC /\ C e. CC ) -> ( ( A x. B ) x. C ) = ( A x. ( B x. C ) ) )

Proof

Step Hyp Ref Expression
1 ax-mulass 
 |-  ( ( A e. CC /\ B e. CC /\ C e. CC ) -> ( ( A x. B ) x. C ) = ( A x. ( B x. C ) ) )