2 papers
math.CO2026
Three Results on Generalized Quasikernels in Digraphs
Zejun Huang, Chenxi Yang
A -kernel of a digraph is an independent set such that every vertex of is reachable from by a directed path of length at most , which is a natural…
math.CO2024
Nonregular graphs with a given maximum degree attaining maximum spectral radius
Zejun Huang, Jiahui Liu, Chenxi Yang
Let be a connected nonregular graphs of order with maximum degree that attains the maximum spectral radius. Liu and Li (2008) proposed a conjecture stating that ha…