Towards a Better Understanding of the Semigroup Tree

Details Towards a Better Understanding of the Semigroup Tree Towards a Better Understanding of the Semigroup Tree

2008-10-09

arxiv.org/abs/0810.1619v1

Mathematics

Combinatorics

17 pages, 2 figures

Scientific paper

In this paper we elaborate on the structure of the semigroup tree and the regularities on the number of descendants of each node observed earlier. These regularites admit two different types of behavior and in this work we investigate which of the two types takes place in particular for well-known classes of semigroups. Also we study the question of what kind of chains appear in the tree and characterize the properties (like being (in)finite) thereof. We conclude with some thoughts that show how this study of the semigroup tree may help in solving the conjecture of Fibonacci-like behavior of the number of semigroups with given genus.

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