Quasiregular Mappings

Description

Quasiregular Mappings extend quasiconformal theory to the noninjective case.They give a natural and beautiful generalization of the geometric aspects ofthe theory of analytic functions of one complex variable to Euclidean n-space or, more generally, to Riemannian n-manifolds. This book is a self-contained exposition of the subject. A braod spectrum of results of both analytic and geometric character are presented, and the methods vary accordingly. The main tools are the variational integral method and the extremal length method, both of which are thoroughly developed here. Reshetnyak's basic theorem on discreteness and openness is used from the beginning, but the proof by means of variational integrals is postponed until near the end. Thus, the method of extremal length is being used at an early stage and leads, among other things, to geometric proofs of Picard-type theorems and a defect relation, which are some of the high points of the present book Front Matter....Pages I-X Introduction....Pages 1-3 Basic Properties of Quasiregular Mappings....Pages 4-23 Inequalities for Moduli of Path Families....Pages 24-58 Applications of Modulus Inequalities....Pages 59-77 Mappings into the n -Sphere with Punctures....Pages 78-93 Value Distribution....Pages 94-128 Variational Integrals and Quasiregular Mappings....Pages 129-161 Boundary Behavior....Pages 162-197 Back Matter....Pages 198-213