LegacyConversions

Converters from the data of the legacy packages (GT patterns, tableaux, area lists, key indices) to the supported conventions.

Load with Needs["LegacyConversions`"].

Functions and symbols

FromLegacyAreaList

FromLegacyAreaList[a] reverses a ChromaticFunctions area list ending in 0 to the 0-first convention used by CatalanObjects and UnicellularChromatics.

FromLegacyEdges

FromLegacyEdges[edges,n] converts a legacy edge list to the supported vertex convention by relabelling every vertex v as n + 1 - v and reversing each ordered edge.

FromLegacyGTPattern

FromLegacyGTPattern[OldYoungTableaux`GTPattern[rows]] converts legacy top-to-bottom rows to a GTPatterns`GTPattern with bottom-to-top rows.

FromLegacyIndex

FromLegacyIndex[family,index] converts a legacy nonsymmetric-polynomial index: family “Key”, “TKey”, or “Lock” reverses index, while “Atom”, “TAtom”, “Schubert”, “Slide”, and “FundamentalSlide” leave it unchanged.

FromLegacyKeyIndex

FromLegacyKeyIndex[alpha] reverses a MacdonaldPolynomials key, t-key, or lock index to the standard NonsymmetricPolynomials convention. Atom, t-atom, Schubert, and fundamental-slide indices are unchanged; use FromLegacyIndex for one explicit family.

FromLegacyYoungTableau

FromLegacyYoungTableau[OldYoungTableaux`YoungTableau[rows]] converts legacy skew markers OldYoungTableaux`Private`SKEW to None in a NewTableaux`YoungTableau.

ToLegacyAreaList

ToLegacyAreaList[a] reverses a 0-first area list to the ChromaticFunctions convention ending in 0.

ToLegacyEdges

ToLegacyEdges[edges,n] applies the inverse of FromLegacyEdges; the vertex relabelling v -> n + 1 - v is an involution.

ToLegacyGTPattern

ToLegacyGTPattern[GTPatterns`GTPattern[rows]] converts bottom-to-top rows to the legacy top-to-bottom representation.

ToLegacyYoungTableau

ToLegacyYoungTableau[NewTableaux`YoungTableau[rows]] converts None skew cells to OldYoungTableaux`Private`SKEW.