• Coaction functors 

      Kaliszewski, Steve; Landstad, Magnus B.; Quigg, John (Journal article; Peer reviewed, 2016)
      A certain type of functor on a category of coactions of a locally compact group on C ∗ C∗-algebras is introduced and studied. These functors are intended to help in the study of the crossed-product functors that have ...
    • Exact large ideals of B(G) are downward directed. 

      Kaliszewski, Steve; Landstad, Magnus B.; Quigg, John (Journal article; Peer reviewed, 2016)
      We prove that if E and F are large ideals of B(G) for which the associated coaction functors are exact, then the same is true for E∩F. We also give an example of a coaction functor whose restriction to the maximal coactions ...
    • Exotic Coactions 

      Landstad, Magnus B.; Kaliszewski, Steve; Quigg, John (Journal article; Peer reviewed, 2016)
      If a locally compact group G acts on a C *-algebra B, we have both full and reduced crossed products and each has a coaction of G. We investigate ‘exotic’ coactions in between the two, which are determined by certain ideals ...
    • Haarmål og høyreregulær representasjon på kompakte kvantegrupper 

      Bertelsen, Vegard Steine (Master thesis, 2006)
      I denne oppgaven vil vi definere og vise eksistens av haarmål på kompakte kvantegrupper, se på hvordan vi ved hjelp av haarmålet kan konstruere en høyreregulær representasjon. Vi vil så gjøre dette ganske eksplisitt for ...
    • Maximum Principles in Differential Equations 

      Amare, Gizat Derebe (Master thesis, 2012)
      The aim of this thesis is to investigate the maximum principle, which is one of the most important tools employed in differential equations. Specifically, we explore the maximum principle for linear second-order elliptic ...
    • Properness conditions for actions and coactions 

      Landstad, Magnus B.; Kaliszewski, Steve; Quigg, John (Journal article; Peer reviewed, 2016)
      Three properness conditions for actions of locally compact groups on C⇤-algebras are studied, as well as their dual analogues for coactions. To motivate the properness conditions for actions, the commutative cases (actions ...
    • Topological Dynamics and Algebra in the Spectrum of L infinity of a locally compact Group: With Application to Crossed Products 

      Norling, Magnus Dahler (Master thesis, 2009)
      In this text, I will look at some new approaches that may shed some light on the Kadison Singer problem, mainly one instigated by Vern Paulsen using dynamical systems in the Stone-Cech compactification of a discrete group. ...