期刊
JOURNAL OF MATHEMATICAL CHEMISTRY
卷 51, 期 1, 页码 354-368出版社
SPRINGER
DOI: 10.1007/s10910-012-0087-6
关键词
Kekule structure; Polyomino; Torus; Pfaffian orientation
资金
- NSFC [10831001, 11171279]
Let G be a (molecule) graph. A perfect matching, or Kekul, structure of G is a set of independent edges covering every vertex exactly once. Enumeration of Kekul, structures of a (molecule) graph is interest in chemistry, physics and mathematics. In this paper, we focus on some polyominos on the torus and obtain the explicit expressions on the number of the Kekul, structures of them.
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