Section AlgC.
Variable (gT : finGroupType).
Definition trowb n1 m2 n2 B A :=  @trow n1 A m2 n2 B.
Canonical Structure trowb_linear n1 m2 n2 B :=
Linear (@trowb_is_linear n1 m2 n2 B).

Lemma trow_is_linear n1 m2 n2 (A : 'rV_n1) : linear (@trow n1 A m2 n2).