Free products in R. Thompson's group V

Details Free products in R. Thompson's group V Free products in R. Thompson's group V

2009-11-05

arxiv.org/abs/0911.0979v1

Mathematics

Group Theory

23 pages, 6 diagrams, 7 flow schemata

Scientific paper

We investigate free product structures in R. Thompson's group V, primarily by studying the topological dynamics associated with V's action on the Cantor Set. We show that the class of free products which can be embedded into V includes the free product of any two finite groups, the free product of any finite group with Q/Z, and the countable non-abelian free groups. We also show the somewhat surprising result that Z^2*Z does not embed in V, even though V has many embedded copies of Z^2 and has many embedded copies of free products of pairs of its subgroups.

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