APPLIED MATH SEMINAR

Speaker: Arthur Szlam, Courant Institute

Title: Total variation, Cheeger ratio cuts, and graph clustering.

When/where: Wednesday, November 11th, 4:15 PM, AKW 500

I will discuss a continuous relaxation of the Cheeger cut problem on a
weighted graph, and show how the relaxation is actually equivalent to the
original problem.  Then I will introduce an algorithm which experimentally
is very efficient at approximating the solution to this problem on some
clustering benchmarks.  I will also give a heuristic variant of the
algorithm which is faster but often gives just as accurate clustering
results.  This is joint work with Xavier Bresson, inspired by recent
papers of Buhler and Hein, and Goldstein and Osher, and by an older
paper of Strang.