fact: Definition kermxpoly n (g : 'M_n) (p : {poly K}) : 'M_n := kermx ((if n is n.+1 then horner_mx^~ p : 'M_n.+1 -> 'M_n.+1 else \0) g).
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat choice seq) mathcomp(div fintype tuple finfun bigop fingroup perm) mathcomp(ssralg zmodp matrix mxalgebra poly polydiv)