Back to Hook Formulas Homepage Hook Length Formulas for Partitions and Plane Trees

Discovering hook length formulas by an expansion technique

By Guo-Niu Han

[download the paper: .ps - .pdf, 42 pages, 2008/05/08]

Abstract. We introduce the hook length expansion technique and explain how to discover old and new hook length formulas for partitions and plane trees. The new hook length formulas for trees obtained by our method can be proved rather easily, whereas those for partitions are much more difficult and some of them still remain open conjectures. We also develop a Maple package HookExp for computing the hook length expansion. The paper can be seen as a collection of hook length formulas for partitons and plane trees. All examples are illustrated by HookExp and, for many easy cases, expained by well-known combinatorial arguments.

Maple programs for verifing the formulas and conjectures

HookExp.mpl

Back to Hook Formulas Homepage - Last update: 2008/05/08