Theorem 1cnd

Description: One is a complex number, deduction form. (Contributed by David A. Wheeler, 6-Dec-2018)

	Ref	Expression
Assertion	1cnd	|- ( ph -> 1 e. CC )

Proof

Step	Hyp	Ref	Expression
1		ax-1cn	|- 1 e. CC
2	1	a1i	|- ( ph -> 1 e. CC )