Sökning: "mat 2012"

Visar resultat 1 - 5 av 23 avhandlingar innehållade orden mat 2012.

  1. 1. The space of Cohen-Macaulay curves

    Författare :Katharina Heinrich; Roy Skjelnes; Lars Halvard Halle; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : In this thesis we discuss a moduli space of projective curves with a map to a given projective space. The functor CM parametrizes curves, that is, Cohen-Macaulay schemes of pure dimension 1, together with a finite map to the projective space that is an isomorphism onto its image away from a finite set of closed points. LÄS MER

  3. 2. A study of asymptotically hyperbolic manifolds in mathematical relativity

    Författare :Anna Sakovich; Mattias Dahl; James Isenberg; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : This thesis consists of ve papers where certain problems arising in mathematical relativity are studied in the context of asymptotically hyperbolic manifolds.In Paper A we deal with constant mean curvature solutions of the Einstein-scalar field constraint equations on asymptotically hyperbolic manifolds. LÄS MER

  4. 3. Future stability of the Einstein-Maxwell-Scalar field system and non-linear wave equations coupled to generalized massive-massless Vlasov equations

    Författare :Christopher Svedberg; Hans Ringström; Alan Rendall; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : This thesis consists of two articles related to mathematical relativity theory. In the first article we prove future stability of certain spatially homogeneous solutionsto Einstein’s field equations. The matter model is assumed to consist of an electromagnetic field and a scalar field with a potential creating an accelerated expansion. LÄS MER

  5. 4. Parity check systems, perfect codes and codes over Frobenius rings

    Författare :Thomas Westerbäck; Olof Heden; Patric Östergård; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : This thesis consists of five papers related to coding theory. The first four papers are mainly devoted to perfect 1-error correcting binary codes. The fifth paper concerns codes over finite Abelian groups and finite commutative Frobenius rings. In Paper A we construct a new class of perfect binary codes of length 15. LÄS MER

  7. 5. The importance of personality, IQ and learning approaches : predicting academic performance

    Författare :Pia Rosander; Martin Bäckström; Department of Food and Meal Science; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES;

    Sammanfattning : The aim of the present doctoral thesis was to examine to what extent personality traits and approaches to learning contribute to academic performance in upper secondary school (high school), after controlling for the well-known fact that general intelligence accounts for a large part of the variance. The general proposition of the thesis is that personality traits are stable dispositions and therefore predispose an individual to behave or act in a specific manner (Costa & McCrae, 1976). LÄS MER