Lectures on analysis in metric spaces - Publications of the Scuola Normale Superiore

This book contains the notes of an international summer school on Analysis in Metric Spaces. Koskela, Upper gradients and Poincare inequalities; Semmes, Derivatives and difference quotients for Lipschitz or Sobolev functions on various spaces; Wheeden, Some weighted Poincare estimates in spaces of homogenous type.