Theorem ioosscn

Description: An open interval is a set of complex numbers. (Contributed by Glauco Siliprandi, 11-Dec-2019)

	Ref	Expression
Assertion	ioosscn	|- ( A (,) B ) C_ CC

Proof

Step	Hyp	Ref	Expression
1		ioossre	|- ( A (,) B ) C_ RR
2		ax-resscn	|- RR C_ CC
3	1 2	sstri	|- ( A (,) B ) C_ CC