Mathematics – Geometric Topology
Scientific paper
2005-06-20
Geom.Topol. 12(2008), 475-530.
Mathematics
Geometric Topology
35 p
Scientific paper
Pursueing our investigations on the relations between Thompson groups and mapping class groups, we introduce the group $T^*$ (and its further generalizations) which is an extension of the Ptolemy-Thompson group $T$ by means of the full braid group $B_{\infty}$ on infinitely many strands. We prove that it is a finitely presented group with solvable word problem, and give an explicit presentation of it.
Funar Louis
Kapoudjian Christophe
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