Punctured Torus Groups And 2 Bridge Knot Groups I

Here is the first part of a work that provides a full account of Jorgensen's theory of punctured torus Kleinian groups and its generalization. It offers an elementary and self-contained description of Jorgensen's theory with a complete proof. Through various informative illustrations, readers are naturally led to an intuitive, synthetic grasp of the theory, which clarifies how a very simple fuchsian group evolves into complicated Kleinian groups.

This volume contains the proceedings of a conference celebrating the work of Steven Boyer, held from June 2–6, 2018, at Université du Québec à Montréal, Montréal, Québec, Canada. Boyer's contributions to research in low-dimensional geometry and topology, and to the Canadian mathematical community, were recognized during the conference. The articles cover a broad range of topics related, but not limited, to the topology and geometry of 3-manifolds, properties of their fundamental groups and associated representation varieties.

This volume gathers the contributions from the international conference ?Intelligence of Low Dimensional Topology 2006,? which took place in Hiroshima in 2006. The aim of this volume is to promote research in low dimensional topology with the focus on knot theory and related topics. The papers include comprehensive reviews and some latest results.

This study of hyperbolic geometry has both pedagogy and research in mind, and includes exercises and further reading for each chapter.

This volume is based on lectures given at the highly successful three-week Summer School on Geometry, Topology and Dynamics of Character Varieties held at the National University of Singapore's Institute for Mathematical Sciences in July 2010. Aimed at graduate students in the early stages of research, the edited and refereed articles comprise an excellent introduction to the subject of the program, much of which is otherwise available only in specialized texts. Topics include hyperbolic structures on surfaces and their degenerations, applications of ping-pong lemmas in various contexts, introductions to Lorenzian and complex hyperbolic geometry, and representation varieties of surface groups into PSL(2, ℝ) and other semi-simple Lie groups. This volume will serve as a useful portal to students and researchers in a vibrant and multi-faceted area of mathematics. Sample Chapter(s) Foreword (72 KB) Chapter 1: An Invitation to Elementary Hyperbolic Geometry (708 KB) Contents:An Invitation to Elementary Hyperbolic Geometry (Ying Zhang)Hyperbolic Structures on Surfaces (Javier Aramayona)Degenerations of Hyperbolic Structures on Surfaces (Christopher J Leininger)Ping-Pong Lemmas with Applications to Geometry and Topology (Thomas Koberda)Creating Software for Visualizing Kleinian Groups (Yasushi Yamashita)Traces in Complex Hyperbolic Geometry (John R Parker)Lorentzian Geometry (Todd A Drumm)Connected Components of PGL(2,R)-Representation Spaces of Non-Orientable Surfaces (Frédéric Palesi)Rigidity and Flexibility of Surface Groups in Semisimple Lie Groups (Inkang Kim)Abelian and Non-Abelian Cohomology (Eugene Z Xia) Readership: Graduate students, researchers and professors in mathematical areas such as low-dimensional topology, dynamical systems and hyperbolic geometry. Keywords:Character Varieties;Representation Spaces;Mapping Class Groups;Hyperbolic Geometry;Kleinian GroupsKey Features:Accessible introduction to structures on surfaces, measured foliations and the Thurston compactification of Teichmüller spaceHow to write a python program to draw limit sets and other geometric objects associated with simple Kleinian groupsTwo excellent expository articles by students who attended the program

This book consists of 16 surveys on Thurston's work and its later development. The authors are mathematicians who were strongly influenced by Thurston's publications and ideas. The subjects discussed include, among others, knot theory, the topology of 3-manifolds, circle packings, complex projective structures, hyperbolic geometry, Kleinian groups, foliations, mapping class groups, Teichmüller theory, anti-de Sitter geometry, and co-Minkowski geometry. The book is addressed to researchers and students who want to learn about Thurston’s wide-ranging mathematical ideas and their impact. At the same time, it is a tribute to Thurston, one of the greatest geometers of all time, whose work extended over many fields in mathematics and who had a unique way of perceiving forms and patterns, and of communicating and writing mathematics.

This book provides an introduction to hyperbolic geometry in dimension three, with motivation and applications arising from knot theory. Hyperbolic geometry was first used as a tool to study knots by Riley and then Thurston in the 1970s. By the 1980s, combining work of Mostow and Prasad with Gordon and Luecke, it was known that a hyperbolic structure on a knot complement in the 3-sphere gives a complete knot invariant. However, it remains a difficult problem to relate the hyperbolic geometry of a knot to other invariants arising from knot theory. In particular, it is difficult to determine hyperbolic geometric information from a knot diagram, which is classically used to describe a knot. This textbook provides background on these problems, and tools to determine hyperbolic information on knots. It also includes results and state-of-the art techniques on hyperbolic geometry and knot theory to date. The book was written to be interactive, with many examples and exercises. Some important results are left to guided exercises. The level is appropriate for graduate students with a basic background in algebraic topology, particularly fundamental groups and covering spaces. Some experience with some differential topology and Riemannian geometry will also be helpful.