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math.CO2010
The A-like matrices for a hypercube
Stefko Miklavic, Paul Terwilliger
Let denote a positive integer and let denote the graph of the -dimensional hypercube. Let denote the vertex set of and let $A \in \MX$ denote the adjacency m…
math.CO2010★ 1 cited
Tridiagonal matrices with nonnegative entries
Kazumasa Nomura, Paul Terwilliger
In this paper we characterize the nonnegative irreducible tridiagonal matrices and their permutations, using certain entries in their primitive idempotents. Our main result is summ…