proposition: Lemma dim_algid A : \dim <[algid A]> = 1%N.
proof: Proof. by rewrite dim_vline algid_neq0. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat seq path) mathcomp(choice fintype div tuple finfun bigop ssralg) mathcomp(finalg zmodp matrix vector poly)