proposition: Lemma sympolyfK p : sympolyf_eval (sympolyf p) = p.
proof: Proof. by apply val_inj; rewrite /= -[RHS]sympolyfP sympolyf_evalE. 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