Groups with infinitely many ends are not fraction groups
Groups, geometry, and dynamics, Tome 9 (2015) no. 1, pp. 317-323

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DOI

We show that any finitely generated group F with infinitely many ends is not a group of fractions of any finitely generated proper subsemigroup P, that is F cannot be expressed as a product PP−1. In particular this solves a conjecture of Navas in the positive. As a corollary we obtain a new proof of the fact that finitely generated free groups do not admit isolated left-invariant orderings.
DOI : 10.4171/ggd/314
Classification : 20-XX
Mots-clés : Groups with infinitely many ends, groups of fractions, isolated orderings

Dawid Kielak  1

1 Universität Bonn, Germany
Dawid Kielak. Groups with infinitely many ends are not fraction groups. Groups, geometry, and dynamics, Tome 9 (2015) no. 1, pp. 317-323. doi: 10.4171/ggd/314
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     title = {Groups with infinitely many ends are not fraction groups},
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     year = {2015},
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     doi = {10.4171/ggd/314},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/ggd/314/}
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