proposition: Lemma homog_X_mPo_gen nv m : 'X_[m] \mPo G nv \is (mnmwgt m).-homog.
proof: Proof. Proof using gen gen_homog. rewrite comp_mpolyX /mnmwgt; apply: prod_homog => k. by rewrite tnth_mktuple mulnC dhomogMn. 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