Second and Third Extremals of Catacondensed Hexagonal Systems With Respect To the Pi Index
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نویسنده
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Yarahmadi Zahra ,Moradi Sirous
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منبع
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Iranian Journal Of Mathematical Chemistry - 2010 - دوره : 1 - شماره : 1 - صفحه:95 -103
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چکیده
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The padmakar-ivan (pi) index is a wiener-szeged-like topological index which reflects certain structural features of organic molecules. the pi index of a graph g is the sum of all edges uv of g of the number of edges which are not equidistant from the vertices u and v. in this paper we obtain the second and third extremals of catacondensed hexagonal systems with respect to the pi index.
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کلیدواژه
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Topological Index; Pi Index; Catacondensed Hexagonal System.
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آدرس
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Islamic Azad University, Faculty Of Science, Department Of Mathematics, ایران, Arak University, Faculty Of Science, Department Of Mathematics, ایران
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پست الکترونیکی
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s-moradi@araku.ac.ir
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