fact: Definition tabord_of_nat (t : stdtabsh la) := TabSh (sh := la) (tabord_of_nat_subproof t).
imports: HB(structures) mathcomp(all_ssreflect) mathcomp(ssralg ssrint fingroup perm) mathcomp(mpoly) tools combclass ordtype sorted partition tableau skewpart skewtab antisym Schur_mpoly freeSchur therule std stdtab unitriginv presentSn