Sökning: "twisted K-theory"
Hittade 3 avhandlingar innehållade orden twisted K-theory.
1. Group Extensions, Gerbes and Twisted K-theory
Sammanfattning : This thesis reviews the theory of group extensions, gerbes and twisted K-theory. Application to anomalies in gauge theory is briefly discussed. The main results are presented in two appended scientific papers. LÄS MER
2. Abelian Extensions, Fractional Loop Group and Quantum Fields
Sammanfattning : This thesis deals with the theory of Lie group extensions, Lie conformal algebras and twisted K-theory, in the context of quantum physics. These structures allow for a mathematically precise description of certain aspects of interacting quantum field theories. LÄS MER
3. Quaternionic Transgression in Hyperkähler Geometry
Sammanfattning : It is known, that hyperkähler varieties being a special case of Riemann and Kähler manifolds, admit more symmetries. For this reason, all important structures possibly admit hyperkähler generalization. Some of these generalizations make a theme of this thesis. LÄS MER