Overview

The theory of idempotent matrices with entries in complex group algebras has recently experienced a revival, in view of its close relationship with deep geometric problems and conjectures. The relevant questions studied in this book for general groups are motivated by specific examples. A variety of techniques is employed from commutative algebra, homological algebra and functional analysis.

The book can serve as an introduction to this lively research area. The pace is suitable for independent study and the level of the presentation not very demanding. The exercises at the end of each chapter form an essential part of the book.

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9783540813514

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From the reviews: <p> The study of idempotent elements in the group algebras originates from geometric and analytic considerations. a ] This book provides an introduction to the study of these problems for graduate students and researchers a ] . collects and presents in a systematic way basic techniques and important results that have been obtained during the past few decades. a ] The book is suitable for independent study a ] . Moreover, all chapters and appendices finish with a sufficient number of exercises that also increase the quality of the book. (S. V. Mihovski, Zentralblatt MATH, Vol. 1093 (19), 2006)

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