Theorem chpcl

Description: Closure for the second Chebyshev function. (Contributed by Mario Carneiro, 7-Apr-2016)

	Ref	Expression
Assertion	chpcl	$$⊢A\in ℝ\to \psi \left(A\right)\in ℝ$$

Proof

Step	Hyp	Ref	Expression
1		chpf	$$⊢\psi :ℝ⟶ℝ$$
2	1	ffvelrni	$$⊢A\in ℝ\to \psi \left(A\right)\in ℝ$$