> < ^ Date: Wed, 11 Sep 1996 09:34:29 -0700
> < ^ From: Paul R. Brown <pbrown@math.berkeley.edu >
^ Subject: Laplacian for graphs?

Dear Forum,

Does anyone out there have a program to compute the eigenvalues of the
Laplacian on a graph? I find an "eigenvalues" function, but it is for
character tables. I'm after a way to get reasonable rational
approximations to the eigenvalues of a matrix related to the incidence
matrix. (Newton's method would be fine.)

Many thanks.

Paul Brown

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