proposition: Lemma field_dimS F E : (F <= E)%VS -> (\dim F %| \dim E)%N.
proof: Proof. exact/skew_field_dimS/fieldP. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat seq div) mathcomp(choice fintype tuple finfun bigop ssralg countalg) mathcomp(finalg zmodp matrix vector falgebra poly polydiv) mathcomp(mxpoly generic_quotient)