proposition: Lemma msuppC (c : R) : msupp c%:MP = if c == 0 then [::] else [:: 0%MM].
proof: Proof. by have [->|nz_c] := eqVneq; [rewrite msupp0 | rewrite msuppE domU]. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat seq path) mathcomp(choice fintype tuple finfun bigop finset binomial) mathcomp(order fingroup perm ssralg zmodp poly ssrint) mathcomp(matrix vector) mathcomp(bigenough) ssrcomplements freeg