proposition: Fact cnvarsym_is_multiplicative : multiplicative cnvarsym.
proof: Proof. rewrite /cnvarsym; split. - by move=> u v; apply val_inj; rewrite /= !rmorphM. - by apply val_inj; rewrite /= /comp_mpoly !rmorph1. Qed.
imports: HB(structures) mathcomp(all_ssreflect) mathcomp(ssralg ssrint fingroup perm) mathcomp(ssrcomplements freeg mpoly) sorted tools ordtype permuted partition skewpart composition Yamanouchi std tableau stdtab skewtab permcent antisym Schur_mpoly therule Schur_altdef unitriginv