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MIT Combinatorics Seminar

A Generelized Enumeration of Labeled Trees

Seunghyun Seo (Brandeis University)
shseo@brandeis.edu

Wednesday March 30, 2005   4:15 pm    Room 2-338

ABSTRACT

In this talk, we'll give a simple combinatorial explanation of a formula of A. Postnikov relating bicolored rooted trees to bicolored binary trees. We'll also present generalized formula for the number of labeled k-ary trees, rooted labeled trees, and labeled plane trees. Combinatorial explanations of these formulas will be discussed too.
This is joint work with Ira Gessel.