Metamath Proof Explorer


Theorem nmhmcl

Description: A normed module homomorphism has a real operator norm. (Contributed by Mario Carneiro, 18-Oct-2015)

Ref Expression
Hypothesis isnmhm2.1 ⊢ N = S normOp T
Assertion nmhmcl ⊢ F ∈ S NMHom T → N ⁡ F ∈ ℝ

Proof

Step Hyp Ref Expression
1 isnmhm2.1 ⊢ N = S normOp T
2 nmhmnghm ⊢ F ∈ S NMHom T → F ∈ S NGHom T
3 1 nghmcl ⊢ F ∈ S NGHom T → N ⁡ F ∈ ℝ
4 2 3 syl ⊢ F ∈ S NMHom T → N ⁡ F ∈ ℝ