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math.CO2026
The matching book embedding of the -sum of two graphs
Zeling Shao, Ruxing Sun, Zhiguo Li
The -sum is a new graph operation defined by combining four graph transformation operations with the Cartesian product operation. A matching book embedding of a graph is a b…
math.CO2026
The degeneracy and Alon-Tarsi number under -sum operations
Zhiguo Li, Zhentao Jiao, Zeling Shao
The Alon-Tarsi number of a graph is the smallest such that there exists an orientation of with maximum outdegree satisfying that the number of eve…