New Bounds for Zagreb Eccentricity Indices

作     者：Nilanjan De 

作者机构：Department of Basic Science and Humanities (Mathematics) Calcutta Institute of Engineering and Management Kolkata India 

出 版 物：《Open Journal of Discrete Mathematics》 (离散数学期刊（英文）)

年 卷 期：2013年第3卷第1期

页      面：70-74页

学科分类：07[理学] 0701[理学-数学] 070101[理学-基础数学] 

主　　题：Vertex Degree Eccentricity Zagreb Eccentricity Indices 

摘      要：The Zagrebeccentricity indices are the eccentricity version of the classical Zagrebindices. The first Zagrebeccentricity index (E1(G)) is defined as sum of squares of the eccentricities of the vertices and the second Zagrebeccentricity index (E2(G)) is equal to sum of product of the eccentricities of the adjacent vertices. In this paper we give some new upper and lower bounds for first and second Zagreb eccentricity indices.