Section Op_LinearFct.
Context {K : AbsRing} {V : NormedModule K}.
End Op_LinearFct.

Lemma is_linear_prod {K : AbsRing} {T U V : NormedModule K}
(l1 : T -> U) (l2 : T -> V) :
is_linear l1 -> is_linear l2 -> is_linear (fun t : T => (l1 t, l2 t)).