fact: Definition is_iexph (R : ringType) (k s: nat) h ph := exists2 p : {poly R}, ph = in_qpoly h p & is_ipoly k s p.
imports: mathcomp(all_ssreflect all_fingroup all_field) mathcomp(ssralg finalg poly polydiv zmodp vector qpoly) more_thm rootn lcm_lbound