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The Sigma Coindex of Graph Operations
Journal of Mathematics ( IF 1.4 ) Pub Date : 2021-05-07 , DOI: 10.1155/2021/5534444
Yasar Nacaroglu 1
Affiliation  

The sigma coindex is defined as the sum of the squares of the differences between the degrees of all nonadjacent vertex pairs. In this paper, we propose some mathematical properties of the sigma coindex. Later, we present precise results for the sigma coindices of various graph operations such as tensor product, Cartesian product, lexicographic product, disjunction, strong product, union, join, and corona product.

中文翻译:

图操作的Sigma Coindex

sigma共指数定义为所有不相邻顶点对的度之间的差的平方和。在本文中,我们提出了sigma指数的一些数学性质。稍后,我们为各种图操作(例如张量乘积,笛卡尔乘积,词典词典乘积,析取,强乘积,联合,联接和电晕乘积)的sigma共形提供精确的结果。
更新日期:2021-05-07
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