Messages

Published Oct. 17, 2025 3:49 PM

Mandatory assignment problems are available here: PDF

Submit your answer on Canvas system. The deadline is Friday, 31 October.

Published Oct. 16, 2025 2:27 PM

H?vard Moe (haavamoe@uio.no) is the student representative for this course.

Published Oct. 15, 2025 3:12 PM

We cancel the lecture on Friday, 17 October. On Friday, 24 October, Sergey Neshveyev will step in as a substitute teacher.

Makoto

Published Aug. 12, 2025 2:49 PM

Welcome to the C*-algebra course!

Our plan is to cover the following topics, roughly in this order:

  • First examples of C*-algebras
  • Commutative case
    • Gelfand transform and functional calculus
    • Gelfand-Naimark theorem
  • Basic structure theory
    • Unitization Positive elements
    • Approximate units
    • Ideals and homomorphisms
    • Tensor products
  • von Neumann algebras
    • Operator topologies; von Neumann algebras
    • von Neumann's double commutant theorem
    • Kaplansky's density theorem
  • Representation theory of operator algebras
    • States; Gelfand-Naimark-Segal construction
    • Irreducible representations and pure states
    • Representations of algebras of compact operators; Voiculescu’s theorem
  • ...