Theorem pnfnre2

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

	Ref	Expression
Assertion	pnfnre2	$$⊢\neg \mathrm{+\infty }\in ℝ$$

Proof

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