• Coaction functors, II 

      Kaliszewski, S; Landstad, Magnus Brostrup; Quigg, John (Journal article; Peer reviewed, 2018)
      In their study of the application of crossed-product functors to the Baum–Connes conjecture, Buss, Echterhoff, and Willett introduced various properties that crossed-product functors may have. Here we introduce and study ...
    • Finite Approximations of Quantum Systems in a Non-Archimedean and Archimedean Setting 

      Bakken, Erik Makino (Doctoral thesis at NTNU;2016:212, Doctoral thesis, 2016)
      Approximation of quantum systems by nite dimensional quantum systems goes back to the foundation of quantum mechanics. Finite dimensional quantum systems were considered by Hermann Weyl, and were considered in much ...
    • Ola Bratteli and His Diagrams 

      Landstad, Magnus Brostrup; Elliott, George A.; Bratteli, Tone; Digernes, Trond; Størmer, Erling; Robinson, Derek W; Kishimoto, Akitaka; Jorgensen, Palle E.T.; Evans, David E. (Peer reviewed; Journal article, 2020)
    • Ordered invariant ideals of Fourier-Stieltjes algebras 

      Landstad, Magnus Brostrup; Kaliszewski, Steve; Quigg, John (Journal article; Peer reviewed, 2018)
      For a locally compact group G, every G-invariant subspace E of the Fourier-Stieltjes algebra B(G) gives rise to the following two ideals of the group C ∗ -algebra C ∗ (G): the intersection of the kernels of the representations ...
    • Tensor-product coaction functors 

      Kaliszewski, Steve; Landstad, Magnus Brostrup; Quigg, John (Peer reviewed; Journal article, 2020)
      Recent work by Baum et al. [‘Expanders, exact crossed products, and the Baum–Connes conjecture’, Ann. K-Theory 1(2) (2016), 155–208], further developed by Buss et al. [‘Exotic crossed products and the Baum–Connes conjecture’, ...