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extremal tetracyclic graphs with respect to the first and second zagreb indices
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نویسنده
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habibi nader ,dehghan zadeh tayebeh ,ashrafi ali reza
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منبع
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transactions on combinatorics - 2016 - دوره : 5 - شماره : 4 - صفحه:35 -55
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چکیده
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The first zagreb index, m1(g), and second zagreb index, m2(g), of the graph g is defined as m1(g)=∑v∈v(g)d2(v) and m2(g)=∑e=uv∈e(g)d(u)d(v), where d(u) denotes the degree of vertex u. in this paper, the first and second maximum values of the first and second zagreb indicesin the class of all n−vertex tetracyclic graphs are presented.
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کلیدواژه
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first zagreb index ,second zagreb index ,tetracyclic graph.
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آدرس
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university of ayatollah alozma boroujerdi, department of mathematics, ایران, university of kashan, department of pure mathematics, ایران, university of kashan, department of pure mathematics, ایران
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پست الکترونیکی
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ashrafi@kashan.ac.ir
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Authors
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