Geometry of Riemann Surfaces and Teichmüller Spaces, Volume 169

1st Edition

Authors: M. Seppälä T. Sorvali
Hardcover ISBN: 9780444888464
eBook ISBN: 9780080872803
Imprint: North Holland
Published Date: 1st December 1991
Page Count: 262
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Table of Contents

Geometry of Möbius Transformations. Möbius Transformations. Multiplier preserving isomorphisms. Parametrization problem and classes H, P and E. Geometrical properties of the classes P and H. Parametrization of principal-circle groups by multipliers. Orthogonal decompositions and twist parameters. Quasiconformal Mappings. Conformal invariants. Definitions for quasiconformal mappings. Complex dilatation. Geometry of Riemann Surfaces. Riemann and Klein surfaces. Elementary surfaces. Topological classification of surfaces. Discrete groups of Möbius transformations. Uniformization. Models for symmetric surfaces. Hyperbolic metric of Riemann surfaces. Hurwitz Theorem. Horocycles. Nielsen's criterium for discontinuity. Classification of Fuchsian groups. Short closed curves. Collars. Length spectrum. Pants decompositions of compact surfaces. Shortest curves on a hyperbolic Riemann surface with a symmetry. Selection of additional simple closed curves on a hyperbolic Riemann surfaces with a symmetry. Numerical estimate. Groups of Möbius transformations and matrix groups. Traces of commutators. Liftings of Fuchsian groups. Moduli Problems and Teichmüller Spaces. Quasiconformal mappings of Riemann surfaces. Teichmüller spaces of Klein surfaces. Teichmüller spaces of Beltrami differentials. Non-classical Klein surfaces. Teichmuüller spaces of genus 1 surfaces. Teichmuüller spaces of reflection groups. Parametrization of Teichmuüller spaces. Geodesic length functions. Discontinuity of the action of the modular group. Representations of groups. The algebraic structure. Reduction of parameters. Extension to non-classical surfaces. Moduli Spaces. Moduli spaces of smooth Riemann surfaces. Moduli spaces of genus 1 surfaces. Stable Riemann surfaces. Fenchel-Nielsen coordinates. Topolog

Description

The moduli problem is to describe the structure of the space of isomorphism classes of Riemann surfaces of a given topological type. This space is known as the moduli space and has been at the center of pure mathematics for more than a hundred years. In spite of its age, this field still attracts a lot of attention, the smooth compact Riemann surfaces being simply complex projective algebraic curves. Therefore the moduli space of compact Riemann surfaces is also the moduli space of complex algebraic curves. This space lies on the intersection of many fields of mathematics and may be studied from many different points of view.

The aim of this monograph is to present information about the structure of the moduli space using as concrete and elementary methods as possible. This simple approach leads to a rich theory and opens a new way of treating the moduli problem, putting new life into classical methods that were used in the study of moduli problems in the 1920s.


Details

No. of pages:
262
Language:
English
Copyright:
© North Holland 1992
Published:
Imprint:
North Holland
eBook ISBN:
9780080872803
Hardcover ISBN:
9780444888464

About the Authors

M. Seppälä Author

Affiliations and Expertise

Department of Mathematics, Academy of Finland, Helsinki, Finland

T. Sorvali Author

Affiliations and Expertise

Department of Mathematics, University of Joensuu, Finland