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the harmonic index of subdivision graphs
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نویسنده
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onagh bibi naimeh
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منبع
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transactions on combinatorics - 2017 - دوره : 6 - شماره : 4 - صفحه:15 -27
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چکیده
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the harmonic index of a graph g is defined as the sum of the weights 2degg(u)+degg(v) of all edges uv of g, where degg(u) denotes the degree of a vertex u in g. in this paper, we study the harmonic index of subdivision graphs, t-subdivision graphs and also, s-sum and st-sum of graphs.
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کلیدواژه
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harmonic index ,subdivision ,s-sum ,inverse degree ,zagreb index.
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آدرس
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golestan university, department of mathematics, ایران
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پست الکترونیکی
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bn.onagh@gu.ac.ir
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Authors
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