Sökning: "Local Fourier Analysis"
Visar resultat 1 - 5 av 20 avhandlingar innehållade orden Local Fourier Analysis.
1. Propagation of singularities for pseudo-differential operators and generalized Schrödinger propagators
Sammanfattning : In this thesis we discuss different types of regularity for distributions which appear in the theory of pseudo-differential operators and partial differential equations. Partial differential equations often appear in science and technology. LÄS MER
2. Properties of wave-front sets and non-tangential convergence
Sammanfattning : In this thesis we consider regularity properties for solutions to partial differential equations and pseudo-differential equations. The thesis mainly concerns wave-front sets and micro-local properties. LÄS MER
3. Multigrid Preconditioners for the Discontinuous Galerkin Spectral Element Method : Construction and Analysis
Sammanfattning : Discontinuous Galerkin (DG) methods offer a great potential for simulations of turbulent and wall bounded flows with complex geometries since these high-order schemes offer a great potential in handling eddies. Recently, space-time DG methods have become more popular. LÄS MER
4. Wavelet theory and some of its applications
Sammanfattning : This thesis deals with applied mathematics with wavelets as a joint subject. There is an introduction and two extensive papers, of which one is already published in an international journal. LÄS MER
5. Efficient Solvers for Space-Time Discontinuous Galerkin Spectral Element Methods
Sammanfattning : In this thesis we study efficient solvers for space-time discontinuous Galerkin spectral element methods (DG-SEM). These discretizations result in fully implicit schemes of variable order in both spatial and temporal directions. LÄS MER