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math.CO2020
A Hoffman's Theorem: a revisit with new discovery
Jianfeng Wang, Jing Wang, Maurizio Brunetti
In 1972, A. J. Hoffman proved his celebrated theorem concerning the limit points of spectral radii of non-negative symmetric integral matrices less than . In thi…
math.CO2020★ 2 cited
The Hoffman program of graphs: old and new
Jianfeng Wang, Jing Wang, Maurizio Brunetti
The Hoffman program with respect to any real or complex square matrix associated to a graph stems from A. J. Hoffman's pioneering work on the limit points for the spectral…