Theorem mnfnre2

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

	Ref	Expression
Assertion	mnfnre2	$$⊢\neg \mathrm{-\infty }\in ℝ$$

Proof

Step	Hyp	Ref	Expression
1		mnfnre	$$⊢\mathrm{-\infty }\notin ℝ$$
2	1	neli	$$⊢\neg \mathrm{-\infty }\in ℝ$$