proposition: Lemma card_vspace1 : #|(1%VS : {vspace aT})| = #|F|.
proof: Proof. by rewrite card_vspace (dimv1 aT). Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat seq choice) mathcomp(fintype div tuple bigop prime finset fingroup) mathcomp(ssralg poly polydiv morphism action countalg) mathcomp(finalg zmodp cyclic center pgroup abelian matrix) mathcomp(mxpoly vector falgebra fieldext separable galois)