Introduction to ²-invariants
(Sprache: Englisch)
This book introduces the reader to the most important concepts and problems in the field of ²-invariants. After some foundational material on group von Neumann algebras, ²-Betti numbers are defined and their use is illustrated by several examples. The text...
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Klappentext zu „Introduction to ²-invariants “
This book introduces the reader to the most important concepts and problems in the field of ²-invariants. After some foundational material on group von Neumann algebras, ²-Betti numbers are defined and their use is illustrated by several examples. The text continues with Atiyah's question on possible values of ²-Betti numbers and the relation to Kaplansky's zero divisor conjecture. The general definition of ²-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 ²-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.
Inhaltsverzeichnis zu „Introduction to ²-invariants “
- Introduction. - Hilbert Modules and von Neumann Dimension. - l2-Betti Numbers of CW Complexes. - l2-Betti Numbers of Groups. - Lück's Approximation Theorem. - Torsion Invariants.
Autoren-Porträt von Holger Kammeyer
Holger Kammeyer studied Mathematics at Göttingen and Berkeley. After a postdoc position in Bonn he is now based at Karlsruhe Institute of Technology. His research interests range around algebraic topology and group theory. The application of ²-invariants forms a recurrent theme in his work. He has given introductory courses on the matter on various occasions.
Bibliographische Angaben
- Autor: Holger Kammeyer
- 2019, 1st ed. 2019, VIII, 183 Seiten, Masse: 15,5 x 23,5 cm, Kartoniert (TB), Englisch
- Verlag: Springer, Berlin
- ISBN-10: 3030282961
- ISBN-13: 9783030282967
Sprache:
Englisch
Pressezitat
"This is an excellent introductory book, to be recommended to readers looking for an introduction to the field, as well as those that want to have an overview of recent developments." (Joan Porti, Mathematical Reviews, September, 2020)
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