Automorphisms and coverings of Klein surfaces
Automorphisms and coverings of Klein surfaces
In this thesis the theory of automorphisms and coverings of compact Klein surfaces is discussed by considering a Klein surface as the orbit space of a non-Euclidean crystallographic group. In chapter 1 we set out some of the well-established theory concerning these ideas. In chapter 2 maximal automorphism groups of compact Klein surfaces without boundary are considered. We solve the problem of which groups PSL (2,q) act as maximal automorphism groups of non-orientable Klein surface without boundary. In chapter 3 we discuss cyclic groups acting as automorphism groups of compact Klein surfaces without boundary. It is shown that the maximum order for a cyclic group to be an automorphism group of a compact non-orientable Klein surface without boundary of genus g ?3 is 2g, if g is odd and 2 (g – 1) if g is even. Chapter 4 is the largest section of the thesis. It is concerned with coverings (possibly folded and ramified) of compact Klein surfaces, mainly Klein surfaces with boundary. All possible two-sheeted connected unramified covering surfaces of a Klein surface are classified and the orientability of a normal n-sheeted cover, for odd n, is determined
Hall, Wendy
11f7f8db-854c-4481-b1ae-721a51d8790c
August 1977
Hall, Wendy
11f7f8db-854c-4481-b1ae-721a51d8790c
Hall, Wendy
(1977)
Automorphisms and coverings of Klein surfaces.
University of Southampton, Maths, Doctoral Thesis.
Record type:
Thesis
(Doctoral)
Abstract
In this thesis the theory of automorphisms and coverings of compact Klein surfaces is discussed by considering a Klein surface as the orbit space of a non-Euclidean crystallographic group. In chapter 1 we set out some of the well-established theory concerning these ideas. In chapter 2 maximal automorphism groups of compact Klein surfaces without boundary are considered. We solve the problem of which groups PSL (2,q) act as maximal automorphism groups of non-orientable Klein surface without boundary. In chapter 3 we discuss cyclic groups acting as automorphism groups of compact Klein surfaces without boundary. It is shown that the maximum order for a cyclic group to be an automorphism group of a compact non-orientable Klein surface without boundary of genus g ?3 is 2g, if g is odd and 2 (g – 1) if g is even. Chapter 4 is the largest section of the thesis. It is concerned with coverings (possibly folded and ramified) of compact Klein surfaces, mainly Klein surfaces with boundary. All possible two-sheeted connected unramified covering surfaces of a Klein surface are classified and the orientability of a normal n-sheeted cover, for odd n, is determined
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Introduction.doc
- Accepted Manuscript
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Chapter_1.doc
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CHAPTER_2.doc
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Chapter_3.doc
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Chapter_4.doc
- Accepted Manuscript
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Chapter_4pt_2.doc
- Accepted Manuscript
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Automorphisms_and_Coverings_of_Klein_Surfaces.pdf
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Published date: August 1977
Organisations:
University of Southampton, Electronics & Computer Science
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Local EPrints ID: 259986
URI: http://eprints.soton.ac.uk/id/eprint/259986
PURE UUID: 18ab692e-3f07-4c89-94fd-0975ab31523f
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Date deposited: 26 Sep 2004
Last modified: 30 Jan 2020 01:23
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