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K-Theory and Noncommutative Geometry
Edited by: Guillermo Cortiñas, University of Buenos Aires, Argentina, Joachim Cuntz, University of Münster, Munster, Germany, Max Karoubi, Université Paris VII, France, Ryszard Nest, University of Copenhagen, Denmark, and Charles A. Weibel, Rutgers University, New Brunswick, NJ
A publication of the European Mathematical Society.
EMS Series of Congress Reports
2008; 454 pp; hardcover
Volume: 2
ISBN-10: 3-03719-060-4
ISBN-13: 978-3-03719-060-9
List Price: US$124
Member Price: US$99.20
Order Code: EMSSCR/2
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Since its inception 50 years ago, K-theory has been a tool for understanding a wide-ranging family of mathematical structures and their invariants: topological spaces, rings, algebraic varieties and operator algebras are the dominant examples. The invariants range from characteristic classes in cohomology, determinants of matrices, Chow groups of varieties, as well as traces and indices of elliptic operators. Thus K-theory is notable for its connections with other branches of mathematics.

Noncommutative geometry develops tools which allow one to think of noncommutative algebras in the same footing as commutative ones: as algebras of functions on (noncommutative) spaces. The algebras in question come from problems in various areas of mathematics and mathematical physics; typical examples include algebras of pseudodifferential operators, group algebras, and other algebras arising from quantum field theory.

To study noncommutative geometric problems one considers invariants of the relevant noncommutative algebras. These invariants include algebraic and topological K-theory, and also cyclic homology, discovered independently by Alain Connes and Boris Tsygan, which can be regarded both as a noncommutative version of de Rham cohomology and as an additive version of K-theory. There are primary and secondary Chern characters which pass from K-theory to cyclic homology. These characters are relevant both to noncommutative and commutative problems and have applications ranging from index theorems to the detection of singularities of commutative algebraic varieties.

The contributions to this volume represent this range of connections between K-theory, noncommmutative geometry, and other branches of mathematics.

A publication of the European Mathematical Society (EMS). Distributed within the Americas by the American Mathematical Society.


Graduate students and research mathematicians interested in K-theory and noncommutative geometry.

Table of Contents

  • R. Meyer -- Categorical aspects of bivariant K-theory
  • A. Bartels, S. Echterhoff, and W. Lück -- Inheritance of isomorphism conjectures under colimits
  • H. Emerson and R. Meyer -- Coarse and equivariant co-assembly maps
  • F. Muro and A. Tonks -- On \(K_1\) of a Waldhausen category
  • M. Karoubi -- Twisted \(K\)-theory--old and new
  • C. Voigt -- Equivariant cyclic homology for quantum groups
  • P. C. Rouse -- A Schwartz type algebra for the tangent groupoid
  • J. Cuntz -- \(C^*\)-algebras associated with the \(ax+b\)-semigroup over \(\mathbb{N}\)
  • W. Werner -- On a class of Hilbert \(C^*\)-manifolds
  • U. Bunke, T. Schick, M. Spitzweck, and A. Thom -- Duality for topological abelian group stacks and \(T\)-duality
  • P. Bressler, A. Gorokhovsky, R. Nest, and B. Tsygan -- Deformations of gerbes on smooth manifolds
  • G. Garkusha and M. Prest -- Torsion classes of finite type and spectra
  • T. Geisser -- Parshin's conjecture revisited
  • C. Weibel -- Axioms for the norm residue isomorphism
  • List of contributors
  • List of participants
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