Hao Zhang

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20242026

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2 papers · 1 filter

math.CO2026

A New Sufficient Condition for Oriented Graphs Determined by Their Generalized Skew Spectra

Limeng Lin, Wei Wang, Hao Zhang

Characterizing graphs uniquely determined by their spectra (DS) is a core open problem in spectral graph theory. While this problem has been extensively investigated for simple und…

math.CO2026

Nearly permanental cospectral graphs

Weifang Lv, Quanyu Tang, Wei Wang +1

Let $G$ be a simple graph of order $n$ with adjacency matrix $A = (a_{ij})$ . The \emph{determinant} and the \emph{permanen}t of the matrix $A$ are defined as \[\mathrm{det}A= \sum_{…