Metamath Proof Explorer


Theorem 2cnd

Description: The number 2 is a complex number, deduction form. (Contributed by David A. Wheeler, 8-Dec-2018)

Ref Expression
Assertion 2cnd
|- ( ph -> 2 e. CC )

Proof

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