fact: Definition multiplicity (x : R) (p : {poly R}) := if p == 0 then 0%N else sval (multiplicity_XsubC p x).
imports: mathcomp.ssreflect.ssreflect mathcomp(ssrfun ssrbool eqtype ssrnat seq choice fintype) mathcomp(ssralg poly ssrnum zmodp polydiv interval)