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An Invitation to Unbounded Representations of ∗-Algebras on Hilbert Space

Authors:

  • Provides an accessible introduction to basic results and notions of unbounded representation theory
  • Contains an extensive study of representations of the Weyl algebra and the commutation relation of quantum mechanics
  • Treats many topics in unbounded representation theory in book form for the first time

Part of the book series: Graduate Texts in Mathematics (GTM, volume 285)

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Table of contents (14 chapters)

  1. Front Matter

    Pages i-xviii
  2. \(*\)-Algebras

    • Konrad Schmüdgen
    Pages 7-38
  3. \(O^*\)-Algebras

    • Konrad Schmüdgen
    Pages 39-57
  4. \(*\)-Representations

    • Konrad Schmüdgen
    Pages 59-92
  5. Positive Linear Functionals

    • Konrad Schmüdgen
    Pages 93-120
  6. Representations of Tensor Algebras

    • Konrad Schmüdgen
    Pages 121-135
  7. Integrable Representations of Enveloping Algebras

    • Konrad Schmüdgen
    Pages 187-223
  8. The Operator Relation \(XX^{*}=F(X^{*}X)\)

    • Konrad Schmüdgen
    Pages 251-281
  9. Induced \(*\)-Representations

    • Konrad Schmüdgen
    Pages 283-299
  10. Well-Behaved Representations

    • Konrad Schmüdgen
    Pages 301-317
  11. Back Matter

    Pages 347-381

About this book

This textbook provides an introduction to representations of general ∗-algebras by unbounded operators on Hilbert space, a topic that naturally arises in quantum mechanics but has so far only been properly treated in advanced monographs aimed at researchers.

The book covers both the general theory of unbounded representation theory on Hilbert space as well as representations of important special classes of ∗-algebra, such as the Weyl algebra and enveloping algebras associated to unitary representations of Lie groups. A broad scope of topics are treated in book form for the first time, including group graded ∗-algebras, the transition probability of states, Archimedean quadratic modules, noncommutative Positivstellensätze, induced representations, well-behaved representations and representations on rigged modules.

Making advanced material accessible to graduate students, this book will appeal to students and researchers interested in advanced functional analysis and mathematical physics, and with many exercises it can be used for courses on the representation theory of Lie groups and its application to quantum physics. A rich selection of material and bibliographic notes also make it a valuable reference.

Reviews

“This is a fantastic book. The material it covers is wonderful and exciting. The book is well-written, and in fact pleasant to read. It takes a familiar subject --- that is unfortunately not as popular among mathematicians as it should be --- and presents it from a very evocative perspective. Kudos to Schmüdgen.” (Michael Berg, MAA Reviews, July 22, 2023)

“It is very well written, the style is pleasant and attractive, and the information can be used by beginners and by specialists as well. All chapters are accompanied by exercises and pertinent historical comments. … all researchers interested in representation theory may regard this work not only as a reference book but also as a source of inspiration for further development.” (Florian-Horia Vasilescu, zbMATH 1458.47002, 2021)

Authors and Affiliations

  • Fakultät für Mathematik und Informatik, Universität Leipzig, Leipzig, Germany

    Konrad Schmüdgen

About the author

Konrad Schmüdgen is Emeritus Professor at the Mathematical Institute of the University of Leipzig. He has worked for decades on unbounded representations and made important contributions. Among these are trace representation theorems for linear functionals, noncommutative Positivstellensätze, results on the transition probability, the theory of induced and well-behaved representations and classifications results of representations of special classes of algebras. He is the author of several books, including the Graduate Texts in Mathematics Unbounded Self-adjoint Operators on Hilbert Space (2012) and The Moment Problem (2017).

Bibliographic Information

Buy it now

Buying options

eBook USD 39.99
Price excludes VAT (USA)
  • Available as EPUB and PDF
  • Read on any device
  • Instant download
  • Own it forever
Softcover Book USD 54.99
Price excludes VAT (USA)
  • Compact, lightweight edition
  • Dispatched in 3 to 5 business days
  • Free shipping worldwide - see info
Hardcover Book USD 69.99
Price excludes VAT (USA)
  • Durable hardcover edition
  • Dispatched in 3 to 5 business days
  • Free shipping worldwide - see info

Tax calculation will be finalised at checkout

Other ways to access