proposition: Lemma eqid_refl m (I : 'cV[R]_m) : (I :=: I)%IS.
proof: Proof. exact/eqidP. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat div seq path) mathcomp(ssralg fintype perm choice fingroup) mathcomp(matrix bigop zmodp mxalgebra poly) ssrcomplements