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  4. Outer Space For 2-Dimensional Raags And Fixed Point Sets Of Finite Subgroups

Outer Space For 2-Dimensional Raags And Fixed Point Sets Of Finite Subgroups

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vk75thesisPDF.pdf (2.08 MB)
Permanent Link(s)
https://hdl.handle.net/1813/29505
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Cornell Theses and Dissertations
Author
Kostyuk, Victor
Abstract

In [CCV07], Charney, Crisp, and Vogtmann construct an outer space for a 2dimensional right-angled Artin group A[GAMMA] . It is a contractible space on which a finite index subgroup Out0 (A[GAMMA] ) of Out(A[GAMMA] ) acts properly. We construct a different outer space S (A[GAMMA] ) for A[GAMMA] and show that non-empty fixed point sets of finite subgroups of Out0 (A[GAMMA] ) are contractible in this space. While Culler's realization theorem ([Cul84]) implies that fixed point sets of finite subgroups of Out(Fn ) are always non-empty in the Culler-Vogtmann outer space, there is no direct counterpart to this result in the case of right-angled Artin groups and S (A[GAMMA] ). We present some methods for constructing elements in fixed point sets of finite subgroups and examine cases where such methods are applicable.

Date Issued
2012-01-31
Committee Chair
Vogtmann, Karen L
Committee Member
Riley, Timothy R.
Hatcher, Allen E
Degree Discipline
Mathematics
Degree Name
Ph. D., Mathematics
Degree Level
Doctor of Philosophy
Type
dissertation or thesis

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