more on edge hyper wiener index of graphs
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چکیده
let $g=(v(g),e(g))$ be a simple connected graph with vertex set $v(g)$ and edge set $e(g)$. the (first) edge-hyper wiener index of the graph $g$ is defined as: $$ww_{e}(g)=sum_{{f,g}subseteq e(g)}(d_{e}(f,g|g)+d_{e}^{2}(f,g|g))=frac{1}{2}sum_{fin e(g)}(d_{e}(f|g)+d^{2}_{e}(f|g)),$$ where $d_{e}(f,g|g)$ denotes the distance between the edges $f=xy$ and $g=uv$ in $e(g)$ and $d_{e}(f|g)=sum_{gin e(g)}d_{e}(f,g|g)$. in this paper we use a method, which applies group theory to graph theory, to improving mathematically computation of the (first) edge-hyper wiener index in certain graphs. we give also upper and lower bounds for the (first) edge-hyper wiener index of a graph in terms of its size and gutman index. also we investigate products of two or more graphs and compute the second edge-hyper wiener index of the some classes of graphs. our aim in last section is to find a relation between the third edge-hyper wiener index of a general graph and the hyper wiener index of its line graph. of two or more graphs and compute edge-hyper wiener number of some classes of graphs.
منابع مشابه
MORE ON EDGE HYPER WIENER INDEX OF GRAPHS
Let G=(V(G),E(G)) be a simple connected graph with vertex set V(G) and edge set E(G). The (first) edge-hyper Wiener index of the graph G is defined as: $$WW_{e}(G)=sum_{{f,g}subseteq E(G)}(d_{e}(f,g|G)+d_{e}^{2}(f,g|G))=frac{1}{2}sum_{fin E(G)}(d_{e}(f|G)+d^{2}_{e}(f|G)),$$ where de(f,g|G) denotes the distance between the edges f=xy and g=uv in E(G) and de(f|G)=∑g€(G)de(f,g|G). In thi...
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عنوان ژورنال:
journal of algebraic systemجلد ۴، شماره ۲، صفحات ۱۳۵-۱۵۳
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