Theorem pnfnre2

Description: Plus infinity is not a real number. (Contributed by Glauco Siliprandi, 23-Oct-2021)

	Ref	Expression
Assertion	pnfnre2	|- -. +oo e. RR

Proof

Step	Hyp	Ref	Expression
1		pnfnre	|- +oo e/ RR
2	1	neli	|- -. +oo e. RR