Search for dissertations about: "matrix operators"
Showing result 1 - 5 of 47 swedish dissertations containing the words matrix operators.
-
1. Zero-energy states in supersymmetric matrix models
Abstract : The work of this Ph.D. READ MORE
-
2. Gravity's rainbow : aspects of critical and non-critical string theory
Abstract : .... READ MORE
-
3. Sharp Bounds for Calderón-Zygmund Operators in a Vector-Valued Setting
Abstract : In this thesis we extend several classical results about Calderón-Zygmund operators to spaces of vector-valued functions. We first obtain bounds for the norm of dyadic Haar shift operators using a Bellman function technique, and then apply the representation theorem to obtain corresponding results for general Calderón-Zygmund operators. READ MORE
-
4. Scattering on the Timoshenko Beam. Direct and Inverse Problems in the Time Domain
Abstract : This thesis concerns the use of time domain methods for treating direct and inverse scattering problems for flexural waves on beams. The Timoshenko equation is used throughout to describe the behaviour of such waves. READ MORE
-
5. Homogenization of Some Selected Elliptic and Parabolic Problems Employing Suitable Generalized Modes of Two-Scale Convergence
Abstract : The present thesis is devoted to the homogenization of certain elliptic and parabolic partial differential equations by means of appropriate generalizations of the notion of two-scale convergence. Since homogenization is defined in terms of H-convergence, we desire to find the H-limits of sequences of periodic monotone parabolic operators with two spatial scales and an arbitrary number of temporal scales and the H-limits of sequences of two-dimensional possibly non-periodic linear elliptic operators by utilizing the theories for evolution-multiscale convergence and λ-scale convergence, respectively, which are generalizations of the classical two-scale convergence mode and custom-made to treat homogenization problems of the prescribed kinds. READ MORE