Consider a relatively hyperbolic group G. We prove that if G is finitely presented, so are its parabolic subgroups. Moreover, a presentation of the parabolic subgroups can be found algorithmically from a presentation of G, a solution of its word problem and generating sets of the parabolic subgroups. We also give an algorithm that finds parabolic subgroups in a given recursively enumerable class of groups.
Keywords: relatively hyperbolic groups, finite presentations, van Kampen diagrams, decision problems
Dahmani, François  1 ; Guirardel, Vincent  2
@article{10_2140_agt_2013_13_3203,
author = {Dahmani, Fran\c{c}ois and Guirardel, Vincent},
title = {Presenting parabolic subgroups},
journal = {Algebraic and Geometric Topology},
pages = {3203--3222},
year = {2013},
volume = {13},
number = {6},
doi = {10.2140/agt.2013.13.3203},
url = {http://geodesic.mathdoc.fr/articles/10.2140/agt.2013.13.3203/}
}
TY - JOUR AU - Dahmani, François AU - Guirardel, Vincent TI - Presenting parabolic subgroups JO - Algebraic and Geometric Topology PY - 2013 SP - 3203 EP - 3222 VL - 13 IS - 6 UR - http://geodesic.mathdoc.fr/articles/10.2140/agt.2013.13.3203/ DO - 10.2140/agt.2013.13.3203 ID - 10_2140_agt_2013_13_3203 ER -
Dahmani, François; Guirardel, Vincent. Presenting parabolic subgroups. Algebraic and Geometric Topology, Tome 13 (2013) no. 6, pp. 3203-3222. doi: 10.2140/agt.2013.13.3203
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