Theorem oveqi

Description: Equality inference for operation value. (Contributed by NM, 24-Nov-2007)

	Ref	Expression
Hypothesis	oveq1i.1	|- A = B
Assertion	oveqi	|- ( C A D ) = ( C B D )

Proof

Step	Hyp	Ref	Expression
1		oveq1i.1	|- A = B
2		oveq	|- ( A = B -> ( C A D ) = ( C B D ) )
3	1 2	ax-mp	|- ( C A D ) = ( C B D )