Theorem times2i

Description: A number times 2. (Contributed by NM, 11-May-2004)

	Ref	Expression
Hypothesis	2timesi.1	|- A e. CC
Assertion	times2i	|- ( A x. 2 ) = ( A + A )

Proof

Step	Hyp	Ref	Expression
1		2timesi.1	|- A e. CC
2		times2	|- ( A e. CC -> ( A x. 2 ) = ( A + A ) )
3	1 2	ax-mp	|- ( A x. 2 ) = ( A + A )