proposition: Fact v2r_subproof : Vector.axiom vT vT.
proof: Proof. exact: vector_subdef. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat seq choice) mathcomp(fintype bigop finfun tuple) mathcomp(ssralg matrix mxalgebra zmodp)