New York Combinatorics Seminar

Graduate Center, CUNY

Fridays 11:00 am - 12:00 am Room 3308

Note the room has changed

This seminar covers a wide range of topics in combinatorics and its applications to other disciplines, especially computer science.

The CUNY Graduate Center is located at 365 Fifth Avenue (at the corner of 34th Street), New York. It can be easily approached by subway, using the B,D,F,N,Q,R, or 6 trains.

Seminar organizers are Jonathan Cutler, Ezra Halleck, Christopher Hanusa, Sandra Kingan, and Kerry Ojakian.

Fall 2015 Talks

September 18, 2015: Steve Butler (Iowa State University)

Title: Aspects of the normalized Laplacian matrix

Abstract: The eigenvalues of the normalized Laplacian matrix give information about the graph the matrix is associated with, including data on expansion and mixing. But the spectrum has some various quirks, for example they cannot detect the number of edges. We will give an introduction to the matrix and establish several properties including the construction of cospectral graphs.

October 2, 2015: Michael Yatauro (Penn State Brandywine)

Title: TBA

Previous Speakers

Spring 2015
Fall 2014
Spring 2014
Fall 2013
Spring 2013
Fall 2012
Spring 2012
Fall 2011
Spring 2011
Previous Talks hosted by Janos Pach