11 citations · 11 across the 8 of their papers we have counts for
Showing 2021Show all
2 papers · 1 filter
math.CO2021
Revisiting the Maximum Principal Ratio of Graphs
Lele Liu, Changxiang He
Let be a connected graph, the principal ratio of is the ratio of the maximum and minimum entries of its Perron eigenvector. In 2007, Cioab\v a and Gregory conjectured that…
math.CO2021
Some -spectral extremal results for some digraphs
Haiying Shan, Feifei Wang, Changxiang He
In this paper, we characterize the extremal digraphs with the maximal or minimal -spectral radius among some digraph classes such as rose digraphs, generalized theta digraphs an…