Search for dissertations about: "equation"

Showing result 1 - 5 of 1318 swedish dissertations containing the word equation.

  1. 1. The Dirac Equation: Numerical and Asymptotic Analysis

    Author : Hasan Almanasreh; Göteborgs universitet.; Gothenburg University.; [2012]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Dirac operator; eigenvalue problem; finite element method; spurious eigenvalues; Petrov-Galerkin; cubic Hermite basis functions; stability parameter; meshfree method; $hp$-cloud; intrinsic enrichment; G-convergence; $ Gamma$-convergence; scattering theory; identification; wave operator; stationary approach; meshfree method; $hp$-cloud; stability parameter; cubic Hermite basis functions; scattering theory; intrinsic enrichment; identification; spurious eigenvalues; wave operator; finite element method; $ Gamma$-convergence; eigenvalue problem; stationary approach; Petrov-Galerkin; G-convergence;

    Abstract : The thesis consists of three parts, although each part belongs to a specific subject area in mathematics, they are considered as subfields of the perturbation theory. The main objective of the presented work is the study of the Dirac operator; the first part concerns the treatment of the spurious eigenvalues in the computation of the discrete spectrum. READ MORE

  2. 2. The inevitable equation : the antithetic pattern of Theodore Dreiser's thought and art

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Rolf Lundén; [1973]
    Keywords : HUMANIORA; HUMANITIES; HUMANITIES and RELIGION Languages and linguistics Other Germanic languages English language; HUMANIORA och RELIGIONSVETENSKAP Språkvetenskap Övriga germanska språk Engelska språket;

    Abstract : .... READ MORE

  3. 3. On weak and strong convergence of numerical approximations of stochastic partial differential equations

    University dissertation from Göteborg : Chalmers University of Technology

    Author : Fredrik Lindgren; Göteborgs universitet.; Gothenburg University.; [2012]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Additive noise; Cahn-Hilliard-Cook equation; Error estimate; Finite element; Hyperbolic equation; Parabolic equation; Rational approximation; Stochastic partial differential equation; Strong convergence; Truncation; Wiener process; Weak convergence; Weak convergence; Stochastic partial differential equation; Wiener process; Finite element; Cahn-Hilliard-Cook equation; Error estimate; Hyperbolic equation; Truncation; Strong convergence; Rational approximation; Parabolic equation;

    Abstract : This thesis is concerned with numerical approximation of linear stochastic partialdifferential equations driven by additive noise. In the first part, we develop aframework for the analysis of weak convergence and within this framework weanalyze the stochastic heat equation, the stochastic wave equation, and the linearizedstochastic Cahn-Hilliard, or the linearized Cahn-Hilliard-Cook equation. READ MORE

  4. 4. Propagation of Chaos for Kac-like Particle Systems

    University dissertation from Göteborg : Chalmers University of Technology

    Author : Dawan Mustafa; Göteborgs universitet.; Gothenburg University.; [2015]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Master equations; chaotic densities; kinetic equations; propagation of chaos; Kac model; thermostatted master equation; Boltzmann equation; BGK equation; quenched process; uniform distribution; spectral gap; approximation process; kinetic equations; BGK equation; Boltzmann equation; uniform distribution; quenched process; propagation of chaos; Kac model; spectral gap; thermostatted master equation; approximation process; chaotic densities;

    Abstract : This thesis concerns various aspects of the Kac model. The Kac model is a Markov jump process for a particle system where the total kinetic energy of the system is conserved. This particle model is connected to a limiting equation, describing the evolution of a one-particle density, when the numbers of particles tends to infinity. READ MORE

  5. 5. Symmetries and conservation laws

    University dissertation from Växjö : Växjö University Press

    Author : Raisa Khamitova; Börje Nilsson; Claes Jougréus; Maria Luz Gandarias; [2009]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; conservation law; Noether s theorem; Lie group analysis; Lie-Bäcklund transformations; basis of conservation laws; formal Lagrangian; self-adjoint equation; quasi-selfadjoint; equation; nonlocal conservation law; NATURAL SCIENCES Physics Other physics Mathematical physics; NATURVETENSKAP Fysik Övrig fysik Matematisk fysik;

    Abstract : Conservation laws play an important role in science. The aim of this thesis is to provide an overview and develop new methods for constructing conservation laws using Lie group theory. The derivation of conservation laws for invariant variational problems is based on Noether’s theorem. READ MORE