Zheng-Jiang Xia

activity

20142026

most citedGraphs with many valencies and few eigenvalues

8 citations · 12 across the 12 of their papers we have counts for

collaborators

Showing 2014Show all

2 papers · 1 filter

math.CO2014★ 8 cited

Graphs with many valencies and few eigenvalues

Edwin R. van Dam, Jack H. Koolen, Zheng-jiang Xia

Dom de Caen posed the question whether connected graphs with three distinct eigenvalues have at most three distinct valencies. We do not answer this question, but instead construct…

math.CO2014

Pebbling on $C_{4 k + 3} \times G$ and $M (C_{2 n}) \times G$

Zheng-Jiang Xia, Yong-Liang Pan, Jun-Ming Xu

The pebbling number of a graph $G$ , $f (G)$ , is the least $p$ such that, however $p$ pebbles are placed on the vertices of $G$ , we can move a pebble to any vertex by a sequence of m…

Graphs with many valencies and few eigenvalues

Pebbling on C4k+3​×G and M(C2n​)×G

Pebbling on $C_{4 k + 3} \times G$ and $M (C_{2 n}) \times G$