演講者：丁建太先生

單　位：國立高雄大學應用數學系

日　期：2011年5月11日　PM 14:30

地　點：國立高雄大學理學院408室

講　題：Sign-balance Identities of Adin-Roichman Type on 321-avoiding Alternating Permutations

摘　要：

Adin and Roichman proved a set of refined sign-balance identities on 321-avoiding permutations respecting the last descent of the permutations, which we call the Adin-Roichman type identities. In this work we construct a new involution on plane trees that proves refined sign-balance properties on 321-avoiding alternating permutations respecting the first and last entries of the permutations respectively and obtain two sets of Adin-Roichman type identities.