Theorem fveq2i

Description: Equality inference for function value. (Contributed by NM, 28-Jul-1999)

	Ref	Expression
Hypothesis	fveq2i.1	|- A = B
Assertion	fveq2i	|- ( F ` A ) = ( F ` B )

Proof

Step	Hyp	Ref	Expression
1		fveq2i.1	|- A = B
2		fveq2	|- ( A = B -> ( F ` A ) = ( F ` B ) )
3	1 2	ax-mp	|- ( F ` A ) = ( F ` B )