Theorem fveq2i

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

	Ref	Expression
Hypothesis	fveq2i.1	$$⊢A=B$$
Assertion	fveq2i	$$⊢F\left(A\right)=F\left(B\right)$$

Proof

Step	Hyp	Ref	Expression
1		fveq2i.1	$$⊢A=B$$
2		fveq2	$$⊢A=B\to F\left(A\right)=F\left(B\right)$$
3	1 2	ax-mp	$$⊢F\left(A\right)=F\left(B\right)$$