Theorem mnfnre2

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

	Ref	Expression
Assertion	mnfnre2	⊢ ¬ -∞ ∈ ℝ

Proof

Step	Hyp	Ref	Expression
1		mnfnre	⊢ -∞ ∉ ℝ
2	1	neli	⊢ ¬ -∞ ∈ ℝ