This is an inofficial mirror of http://metamath.tirix.org for personal testing of a visualizer extension only.

Metamath Proof Explorer

Theorem mnfnre2

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

		Ref	Expression
	Assertion	mnfnre2	$⊢ \neg −∞ \in ℝ$

Step	Hyp	Ref	Expression
1		mnfnre	$⊢ −∞ \notin ℝ$
2	1	neli	$⊢ \neg −∞ \in ℝ$