Blar i PhD theses (TN-IMF) på forfatter "Hervik, Sigbjørn"

Viser treff 1-3 av 3

    • A mathematical approach to Wick rotations 

      Helleland, Christer (PhD thesis UiS;536, Doctoral thesis, 2020-09)
      In this thesis we define Wick-rotations mathematically using pseudo-Riemannian geometry, and relate Wick-rotations to real geometric invariant theory (GIT). We discover some new results concerning the existence of Wick ...

    • Nil-Killing vector fields and Kundt structures 

      Aadne, Matthew Terje (PhD thesis UiS;529, Doctoral thesis, 2020-06)
      This thesis is based on three papers, for which two have been submitted for publication and one is published. A chapter presenting relevant background material is included giving convenient access to preliminary foreknowledge ...

    • Tales from Wonderland 

      Normann, Ben David (Doctoral thesis, 2020-06)
      Knowing that the Universe is quite isotropic, one may, as already discussed in Chapter 1, wonder how likely such a Universe is. We take the following research question. Question 1. Is the asymptotic future of a cosmology ...