Non positive semidefinite?
- From: ss54@xxxxxxxxxx
- Date: Sun, 29 May 2005 01:00:05 +0000 (UTC)
Is it true that if L is the combinatorial Laplacian of a simple graph
and D is a nonzero diagonal matrix with integer entries and trace zero
then L+D has a negative eigenvalue?
Thanks for your time.
Simone
.
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