Let be a simple graph with vertex set V and edge set E. A function is said to be a reverse total signed vertex dominating function if for every , the sum of function values over v and the elements incident to v is les...Let be a simple graph with vertex set V and edge set E. A function is said to be a reverse total signed vertex dominating function if for every , the sum of function values over v and the elements incident to v is less than zero. In this paper, we present some upper bounds of reverse total signed vertex domination number of a graph and the exact values of reverse total signed vertex domination number of circles, paths and stars are given.展开更多
针对符号图的列表点染色问题,证明了任何不含K_5-子式或K_(3,3)-子式的符号图的选择数至多为5,并且此处的上界5是不可再降低的,从而推广了Jin、Kang与Steffen发表于"European Journal of Combinatorics,2016,52:234-243"的关...针对符号图的列表点染色问题,证明了任何不含K_5-子式或K_(3,3)-子式的符号图的选择数至多为5,并且此处的上界5是不可再降低的,从而推广了Jin、Kang与Steffen发表于"European Journal of Combinatorics,2016,52:234-243"的关于符号平面图的对应结论。展开更多
文摘Let be a simple graph with vertex set V and edge set E. A function is said to be a reverse total signed vertex dominating function if for every , the sum of function values over v and the elements incident to v is less than zero. In this paper, we present some upper bounds of reverse total signed vertex domination number of a graph and the exact values of reverse total signed vertex domination number of circles, paths and stars are given.
文摘针对符号图的列表点染色问题,证明了任何不含K_5-子式或K_(3,3)-子式的符号图的选择数至多为5,并且此处的上界5是不可再降低的,从而推广了Jin、Kang与Steffen发表于"European Journal of Combinatorics,2016,52:234-243"的关于符号平面图的对应结论。