Stable subgroups and Morse subgroups in mapping class groups
| Autor: | Heejoung Kim |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Pure mathematics
Class (set theory) Group (mathematics) General Mathematics 010102 general mathematics Geometric Topology (math.GT) Group Theory (math.GR) Morse code 01 natural sciences law.invention Mathematics - Geometric Topology Mathematics::Group Theory Quasiconvex function law 0103 physical sciences FOS: Mathematics 010307 mathematical physics Finitely generated group 0101 mathematics Mathematics - Group Theory Mathematics |
| Zdroj: | International Journal of Algebra and Computation. 29:893-903 |
| ISSN: | 1793-6500 0218-1967 |
| DOI: | 10.1142/s0218196719500346 |
| Popis: | For a finitely generated group, there are two recent generalizations of the notion of a quasiconvex subgroup of a word-hyperbolic group, namely a stable subgroup and a Morse or strongly quasiconvex subgroup. Durham and Taylor defined stability and proved stability is equivalent to convex cocompactness in mapping class groups. Another natural generalization of quasiconvexity is given by the notion of a Morse or strongly quasiconvex subgroup of a finitely generated group, studied recently by Tran and Genevois. In general, a subgroup is stable if and only if the subgroup is Morse and hyperbolic. In this paper, we prove that two properties of being Morse and stable coincide for a subgroup of infinite index in the mapping class group of an oriented, connected, finite type surface with negative Euler characteristic. Comment: 11 pages, v2: changed the title, revised abstract and introduction, corrected typos |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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