Theorem pnfnre2

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

	Ref	Expression
Assertion	pnfnre2	⊢ ¬ +∞ ∈ ℝ

Proof

Step	Hyp	Ref	Expression
1		pnfnre	⊢ +∞ ∉ ℝ
2	1	neli	⊢ ¬ +∞ ∈ ℝ