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math.CO2016★ 1 cited
The critical groups of the Peisert graphs
Peter Sin
The critical group of a finite graph is an abelian group defined by the Smith normal form of the Laplacian. We determine the the critical groups of the Peisert graphs, a certain fa…
math.CO2016
New Bounds for Partial Spreads of and Partial Ovoids of the Ree-Tits Octagon
Ferdinand Ihringer, Peter Sin, Qing Xiang
Two results are obtained that give upper bounds on partial spreads and partial ovoids respectively. The first result is that the size of a partial spread of the Hermitian polar spa…