Theorem 2timesi

Description: Two times a number. (Contributed by NM, 1-Aug-1999)

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

Proof

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