Sökning: "eigenvalue problem"
Visar resultat 1 - 5 av 51 avhandlingar innehållade orden eigenvalue problem.
Sammanfattning : 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. LÄS MER
2. Development of New Monte Carlo Methods in Reactor Physics Criticality, Non-Linear Steady-State and Burnup ProblemsDetta är en avhandling från Stockholm : Universitetsservice US AB
Sammanfattning : The Monte Carlo method is, practically, the only approach capable of giving detail insight into complex neutron transport problems. In reactor physics, the method has been used mainly for determining the keff in criticality calculations. LÄS MER
- Detta är en avhandling från Karlstad : Karlstads universitet
Sammanfattning : This thesis consists of two different parts, related to two different fields in mathematical physics: wave propagation and kinetic theory of gases. Various mathematical and computational problems for equations from these areas are treated. LÄS MER
- Detta är en avhandling från Luleå : Luleå University of Technology
Sammanfattning : In this PhD thesis we study some weighted regular Sturm-Liouville problems in which the weight function takes on both positive and negative signs in an appropriate interval [a,b]. With such problems there is the possible existence of non-real eigenvalues, unlike in the definite case (i.e. LÄS MER
5. Parallel Algorithms and Library Software for the Generalized Eigenvalue Problem on Distributed Memory Computer SystemsDetta är en avhandling från Umeå : Umeå universitet
Sammanfattning : We present and discuss algorithms and library software for solving the generalized non-symmetric eigenvalue problem (GNEP) on high performance computing (HPC) platforms with distributed memory. Such problems occur frequently in computational science and engineering, and our contributions make it possible to solve GNEPs fast and accurate in parallel using state-of-the-art HPC systems. LÄS MER