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Note on properties of First Zagreb Index of Graphs
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نویسنده
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TAVAKOLI M. ,RAHBARNIA F.
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منبع
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iranian journal of mathematical chemistry - 2012 - دوره : 3 - - کد همایش: - صفحه:1 -5
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چکیده
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Let g be a graph. the first zagreb m1(g) of graph g is defined as: m1(g) = ?u?v(g) deg(u)2. in this paper, we prove that each even number except 4 and 8 is a first zagreb index of a caterpillar. also, we show that the fist zagreb index cannot be an odd number. moreover, we obtain the fist zagreb index of some graph operations.
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کلیدواژه
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Topological indices ,The first and second Zagreb indices ,Tree ,Graph operation ,Strongly distance? balanced graph
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آدرس
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ferdowsi university of mashhad, ایران, ferdowsi university of mashhad, ایران
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Authors
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