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Original scientific paper

Topological Properties of Benzenoid Systems. XXI. Theorems, Conjectures, Unsolved Problems

Ivan Gutman ; Faculty of Science, University of Kragujevac, P. 0. Box 60, 34000 Kragujevac Serbia, Yugoslavia

Full text: english pdf 4.226 Kb

page 365-374

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The main known mathematical results (in the form of 32 theorems
and 5 conjectures) about benzenoid systems are collected.
A few new results (seven theorems) are proved. Seven unsolved
problems are also pointed out.
The paper contains results on the basic properties of benzenoid
graphs, on the number of Kekule structures and on Clar's
resonant sextet formulas.


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