Homological Theory of Representations

'This wide-ranging masterpiece offers the sophisticated abstraction of homological algebra and representation theory together with the meticulous analysis of many down-to-earth examples. Krause's clear style will delight specialists and beginners alike.' Paul Balmer, University of California, Los Angeles 'This text makes an excellent addition to the literature on representation theory. The choice of topics includes most of what one would like to see in the homological end of the subject, especially triangulated categories, derived categories, and tilting. It's nice to see purity and Krull-Gabriel dimension treated well. The level is suitable for an advanced graduate student as well as researchers in related fields.' David Benson, University of Aberdeen 'Over the last fifty years, the representation theory of quivers and finite-dimensional algebras has seen an ever increasing use of tools from homological algebra and has, in turn, significantly contributed to this toolkit through developments like tilting theory, derived Morita theory, quasi-hereditary algebras ... This has led to increased interactions with module theory, non commutative (and commutative) algebraic geometry, Lie representation theory, K-theory, ... In the present volume, Henning Krause is the first to provide a comprehensive panorama of these developments. The presentation puts the emphasis on the theory without neglecting the fundamental examples. The overall organization is of great clarity. The essential notions are introduced with elegance and concision. Proofs taken from the literature are clarified and streamlined and in several instances, they are new. Obviously, this book is the fruit of a deep and prolonged reflection on the foundations of the subject. It will quickly become a standard text, indispensable to students and experienced researchers alike.' Bernhard Keller, Universite de Paris 'This book is an excellent introduction to, though not an introductory textbook on, some of the major threads of research in the representation theory of algebra, broadly interpreted. The point of view is decidedly homological - derived categories and functor categories play a central role - and the writing is spare, demanding mathematically maturity and a good grasp of the basics in both representation theory and homological algebra. The rewards awaiting the reader are plentiful, including new insights on many classical results in the subject.' Srikanth B. Iyengar, University of Utah