Sökning: "diffeomorphisms"

Visar resultat 1 - 5 av 7 avhandlingar innehållade ordet diffeomorphisms.

  1. 1. Geometric Discretization in Shape analysis

    Författare :Erik Jansson; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; compressible fluids; diffeomorphisms; residual neural networks; quantization; machine learning; Shape analysis;

    Sammanfattning : Discretizations in shape analysis is the main theme of this licentiate thesis, which comprises two papers.  The first paper considers  the problem of finding a parameterized time-dependent vector field that warps an initial set of points to a target set of points. LÄS MER

  3. 2. On various aspects of extended objects

    Författare :Mariusz Hynek; Jens Hoppe; Volker Bach; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Mathematics; Matematik;

    Sammanfattning : This thesis concerns classical and quantum aspects of minimal manifolds embedded in flat Minkowski space. In particular, we study the Lie algebra of diffeomorphisms on 2 dimensional compact manifolds as well as discuss singularity formation for relativistic minimal surfaces in co-dimension one. LÄS MER

  4. 3. Analytic AbC constructions in Hamiltonian dynamics and ergodic theory

    Författare :Gerard Farré Puiggalí; Maria Saprykina; Krikorian Raphaël; KTH; []
    Nyckelord :;

    Sammanfattning : Denna avhandling innehåller flera resultat angående störning avintegrerbara dynamiska system. De flesta av dessa resultat erhålls genom konstruktiva metoder utvecklade på sjuttiotalet av D. Anosovoch A. Katok inom ergodteorin. LÄS MER

  5. 4. The geometry of manifolds with asymptotically flat ends

    Författare :Bernardo Hipólito Fernandes; Mattias Dahl; Stephen McCormick; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Matematik; Mathematics;

    Sammanfattning : This monograph thesis is divided into two chapters.In the first, "A study of ALF structures", we prove that the structure at infinity of a ALF manifold is essentially unique, i.e. LÄS MER

  7. 5. Stable phenomena for some automorphism groups in topology

    Författare :Erik Lindell; Dan Petersen; Dan Margalit; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Representation stability; Torelli groups; homotopy automorphisms; rational homotopy theory; Mathematics; matematik;

    Sammanfattning : This licentiate thesis consists of two papers about topics related to representation stability for different automorphisms groups of topological spaces and manifolds.In Paper I, we study the rational homology groups of \textit{Torelli groups} of smooth, compact and orientable surfaces. LÄS MER