Sökning: "existence"

Visar resultat 31 - 35 av 1917 avhandlingar innehållade ordet existence.

  1. 31. Existence and convergence of moments of Student’s t-statistic

    Författare :Fredrik Jonsson; Allan Gut; Lennart Bondesson; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Mathematical statistics; Matematisk statistik; Mathematics; Matematik;

    Sammanfattning : .... LÄS MER

  3. 32. On the existence and non-existence of a solution to the Hartree-Fock equations with an external magnetic field

    Författare :Mattias Enstedt; Igor Chueshov; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Mathematical analysis; Analys; Mathematics; Matematik;

    Sammanfattning : .... LÄS MER

  4. 33. On some Nonlinear Aspects of Wave Motion

    Författare :Erik Wahlén; Partiella differentialekvationer; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; water waves; bifurcation; global existence; rod equation; wabve breaking;

    Sammanfattning : In the first part of this thesis we consider the governing equations for capillary water waves given by the Euler equations with a free surface under the influence of surface tension over a flat bottom. We look for two-dimensional steady periodic waves. The problem is first transformed to a nonlinear elliptic equation in a rectangle. LÄS MER

  5. 34. Qualitative Aspects of Nonlinear Parabolic Partial Differential Equations and Systems

    Författare :Joakim Petersson; Matematik (naturvetenskapliga fakulteten); []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Matematik; Mathematics; Optimal constants; Global existence; Parabolic equations; Quenching;

    Sammanfattning : This thesis contains four papers about some aspects of nonlinear parabolic equations and systems. Paper 1. A note on quenching for parabolic equations with dynamic boundary conditions We present a quenching result for semilinear parabolic equations with dynamic boundary conditions in bounded domains with a smooth boundary. Paper 2. LÄS MER

  7. 35. Existence results for noncoercive incremental contact problems with Coulomb friction

    Författare :Andreas Rietz; Marius Cocou; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Friction is a phenomenon which is present in most mechanical devices and frequently encountered in everyday life. Noncoercive incremental contact problems with Coulomb friction constitute an important class of friction problems due to their frequent occurrence in mechanical engineering. LÄS MER