proposition: Lemma mmapMNn n : {morph mmap: x / x *- n} .
proof: Proof. exact: raddfMNn. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat) mathcomp(seq path choice finset fintype finfun) mathcomp(tuple bigop ssralg ssrint ssrnum) xfinmap