On \(2\)-Factors with Chorded Quadrilaterals in Graphs

Yunshu Gao1, Jin Yan2, Guojun Li2
1School of Mathematics and Computer Science, Ningxia University, Yinchuan 750021, P. R. China,
2School of Mathematics, Shandong University, Jinan, 250100, People’s Republic of China

Abstract

Let \(k\) be a positive integer and \(G\) a graph with order \(n \geq 4k + 3\). It is proved that if the minimum degree sum of any two nonadjacent vertices is at least \(n + k\), then \(G\) contains a 2-factor with \(k + 1\) disjoint cycles \(C_1, \ldots, C_{k+1}\) such that \(C_i\) are chorded quadrilaterals for \(1 \leq i \leq k-1\) and the length of \(C_{k}\) is at most \(4\).