fact: Definition intmul (R : zmodType) (x : R) (n : int) := match n with | Posz n => (x *+ n)%R | Negz n => (x *- (n.+1))%R end.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat choice seq) mathcomp(fintype finfun bigop order ssralg countalg ssrnum) mathcomp(poly)