
Hyperbolic Geometry from a Local Viewpoint
By: Linda Keen, Nikola Lakic, J. W. Bruce (Adapted By)
Paperback | 8 March 2007
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282 Pages
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The authors begin with rigid motions in the plane which are used as motivation for a full development of hyperbolic geometry in the unit disk. The approach is to define metrics from an infinitesimal point of view; first the density is defined and then the metric via integration. The study of hyperbolic geometry in arbitrary domains requires the concepts of surfaces and covering spaces as well as uniformisation and Fuchsian groups. These ideas are developed in the context of what is used later.
The authors then provide a detailed discussion of hyperbolic geometry for arbitrary plane domains. New material on hyperbolic and hyperbolic-like metrics is presented. These are generalisations of the Kobayashi and Caratheodory metrics for plane domains. The book concludes with applications to holomorphic dynamics including new results and accessible open problems.
About the Authors
Linda Keen is a Professor of Mathematics at the City University of New York, Lehman College and the Graduate Center.
Nikola Lakic is an Associate Professor of Mathematics at the City University of New York, Lehman College and the Graduate Center.
Industry Reviews
| Introduction | p. 1 |
| Elementary transformations of the Euclidean plane and the Riemann sphere | p. 5 |
| The Euclidean metric | p. 5 |
| Rigid motions | p. 6 |
| Scaling maps | p. 8 |
| Conformal mappings | p. 9 |
| The Riemann sphere | p. 11 |
| Mobius transformations and the cross ratio | p. 13 |
| Classification of Mobius transformations | p. 18 |
| Mobius groups | p. 22 |
| Discreteness of Mobius groups | p. 24 |
| The Euclidean density | p. 26 |
| Other Euclidean type densities | p. 31 |
| Hyperbolic metric in the unit disk | p. 32 |
| Definition of the hyperbolic metric in the unit disk | p. 32 |
| Hyperbolic geodesics | p. 33 |
| Hyperbolic triangles | p. 39 |
| Properties of the hyperbolic metric in [Delta] | p. 41 |
| The upper half plane model | p. 43 |
| The geometry of PSL(2, R) and [Lambda] | p. 46 |
| Hyperbolic transformations | p. 46 |
| Parabolic transformations | p. 48 |
| Elliptic transformations | p. 50 |
| Hyperbolic reflections | p. 51 |
| Holomorphic functions | p. 53 |
| Basic theorems | p. 53 |
| The Schwarz lemma | p. 55 |
| Normal families | p. 58 |
| The Riemann mapping theorem | p. 59 |
| The Schwarz reflection principle | p. 63 |
| Rational maps and Blaschke products | p. 64 |
| Distortion theorems | p. 66 |
| Topology and uniformization | p. 68 |
| Surfaces | p. 68 |
| The fundamental group | p. 70 |
| Covering spaces | p. 74 |
| Construction of the universal covering space | p. 78 |
| The universal covering group | p. 80 |
| The uniformization theorem | p. 81 |
| Discontinuous groups | p. 83 |
| Discontinuous subgroups of M | p. 83 |
| Discontinuous elementary groups | p. 90 |
| Non-elementary groups | p. 94 |
| Fuchsian groups | p. 96 |
| An historical note | p. 96 |
| Fundamental domains | p. 97 |
| Dirichlet domains and fundamental polygons | p. 101 |
| Vertex cycles of fundamental polygons | p. 110 |
| Poincare's theorem | p. 115 |
| The hyperbolic metric for arbitrary domains | p. 124 |
| Definition of the hyperbolic metric | p. 124 |
| Properties of the hyperbolic metric for X | p. 127 |
| The Schwarz-Pick lemma | p. 130 |
| Examples | p. 133 |
| Conformal density and curvature | p. 139 |
| Conformal invariants | p. 141 |
| Torus invariants | p. 141 |
| Extremal length | p. 143 |
| General Riemann surfaces | p. 147 |
| The collar lemma | p. 148 |
| The Kobayashi metric | p. 153 |
| The classical Kobayashi density | p. 153 |
| The Kobayashi density for arbitrary domains | p. 154 |
| Generalized Kobayashi density: basic properties | p. 155 |
| Examples | p. 161 |
| The Caratheodory pseudo-metric | p. 163 |
| The classical Caratheodory density | p. 163 |
| Generalized Caratheodory pseudo-metric | p. 165 |
| Generalized Caratheodory density: basic properties | p. 166 |
| Examples | p. 170 |
| Inclusion mappings and contraction properties | p. 172 |
| Estimates of hyperbolic densities | p. 172 |
| Strong contractions | p. 173 |
| Lipschitz domains | p. 175 |
| Generalized Lipschitz and Bloch domains | p. 180 |
| Kobayashi Lipschitz domains | p. 180 |
| Kobayashi Bloch domains | p. 182 |
| Caratheodory Lipschitz domains | p. 182 |
| Caratheodory Bloch domains | p. 184 |
| Examples | p. 184 |
| Applications I: forward random holomorphic iteration | p. 191 |
| Random holomorphic iteration | p. 191 |
| Forward iteration | p. 192 |
| Applications II: backward random iteration | p. 195 |
| Compact subdomains | p. 195 |
| Non-compact subdomains: the c[kappa]-condition | p. 196 |
| The overall picture | p. 198 |
| Applications III: limit functions | p. 201 |
| Uniqueness of limits | p. 201 |
| The key lemma | p. 201 |
| Proof of Theorem 13.1.1 | p. 203 |
| Non-Bloch domains and non-constant limits | p. 207 |
| Preparatory lemmas | p. 207 |
| A necessary condition for degeneracy | p. 208 |
| Proof of Theorem 13.2.2 | p. 215 |
| Equivalence of conditions | p. 217 |
| Estimating hyperbolic densities | p. 219 |
| The smallest hyperbolic densities | p. 219 |
| A formula for [rho subscript 01] | p. 220 |
| A lower bound on [rho subscript 01] | p. 223 |
| The first estimates | p. 224 |
| Estimates of [rho subscript 01] near the punctures | p. 229 |
| The derivatives of [rho subscript 01] | p. 230 |
| The existence of a lower bound on [rho subscript 01] | p. 234 |
| Properties of the smallest hyperbolic density | p. 236 |
| Comparing Poincare densities | p. 240 |
| Uniformly perfect domains | p. 245 |
| Simple examples | p. 246 |
| Uniformly perfect domains and cross ratios | p. 247 |
| Uniformly perfect domains and separating annuli | p. 249 |
| Uniformly thick domains | p. 253 |
| Appendix: a brief survey of elliptic functions | p. 258 |
| Basic properties of elliptic functions | p. 258 |
| Bibliography | p. 264 |
| Index | p. 268 |
| Table of Contents provided by Ingram. All Rights Reserved. |
ISBN: 9780521682244
ISBN-10: 052168224X
Series: London Mathematical Society Student Texts
Published: 8th March 2007
Format: Paperback
Language: English
Number of Pages: 282
Audience: Professional and Scholarly
Publisher: Cambridge University Press
Country of Publication: GB
Dimensions (cm): 22.86 x 15.24 x 1.63
Weight (kg): 0.4
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