Introduction to ℓ²-invariants /

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Bibliographic Details
Author / Creator:Kammeyer, Holger.
Imprint:Cham : Springer, 2019.
Description:1 online resource (viii, 183 pages) : illustrations
Language:English
Series:Lecture notes in mathematics ; 2247
Lecture notes in mathematics (Springer-Verlag) ; 2247.
Subject:
Format: E-Resource Book
URL for this record:http://pi.lib.uchicago.edu/1001/cat/bib/11981943
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ISBN:9783030282974
303028297X
9783030282967
Summary:This book introduces the reader to the most important concepts and problems in the field of ℓ²-invariants. After some foundational material on group von Neumann algebras, ℓ²-Betti numbers are defined and their use is illustrated by several examples. The text continues with Atiyah's question on possible values of ℓ²-Betti numbers and the relation to Kaplansky's zero divisor conjecture. The general definition of ℓ²-Betti numbers allows for applications in group theory. A whole chapter is dedicated to Lück's approximation theorem and its generalizations. The final chapter deals with ℓ²-torsion, twisted variants and the conjectures relating them to torsion growth in homology. The text provides a self-contained treatment that constructs the required specialized concepts from scratch. It comes with numerous exercises and examples, so that both graduate students and researchers will find it useful for self-study or as a basis for an advanced lecture course.graduate students and researchers will find it useful for self-studying or as basis for an advanced lecture course.
Standard no.:10.1007/978-3-030-28

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