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THE NECESSARY AND SUFFICIENT CONDITIONS FOR BENZENOID SYSTEMS WITH SMALL NUMBER OF HEXAGONS TO HAVE KEKULE PATTERNS(Abstract)

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【Author】 Zhang Fuji Guo Xiaofeng (Dept Math,Xinjiang Univ.)

【摘要】 <正> A concealed non-Kekulean benzenoid system is said to be of type I if it satisfiesSach’s necessary conditions for benzenoid systems to have Kekule patterns [1].Inthis paper we prove that the smallest non-Kekulean benzenoid system of type I

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