Sökning: "Erik Ekström"

Visar resultat 6 - 10 av 22 avhandlingar innehållade orden Erik Ekström.

  1. 6. Matrix-Less Methods for Computing Eigenvalues of Large Structured Matrices

    Författare :Sven-Erik Ekström; Maya Neytcheva; Stefano Serra-Capizzano; Carlo Garoni; Lothar Reichel; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Toeplitz matrices; eigenvalues; eigenvalue asymptotics; polynomial interpolation; extrapolation; generating function and spectral symbol; Beräkningsvetenskap med inriktning mot numerisk analys; Scientific Computing with specialization in Numerical Analysis;

    Sammanfattning : When modeling natural phenomena with linear partial differential equations, the discretized system of equations is in general represented by a matrix. To solve or analyze these systems, we are often interested in the spectral behavior of these matrices. LÄS MER

  3. 7. Breaking the law : adolescents' involvement in illegal political activitiy

    Författare :Viktor Dahl; Erik Amnå; Mats Ekström; Lauree Tilton-Weaver; Sven Oskarsson; Örebro universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; illegal political activity; adolescents; political socialization; Political Science; Statskunskap;

    Sammanfattning : Illegal political activity has always been part of a democratic society. Despite this, not much is known about young people’s involvement in these political activities. LÄS MER

  4. 8. Option Pricing in Jump-to-Default Models

    Författare :Hannah Dyrssen; Erik Ekström; Boualem Djehiche; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Mathematics; Matematik;

    Sammanfattning : .... LÄS MER

  5. 9. Valuation and Optimal Strategies in Markets Experiencing Shocks

    Författare :Hannah Dyrssen; Erik Ekström; Damien Lamberton; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; American options; optimal stopping; game options; jump diffusion; jump to default; free-boundary problems; early exercise premium; integral equation; parabolic pde; convexity; sequential testing; fixed-point approach; Mathematics with specialization in Applied Mathematics; Matematik med inriktning mot tillämpad matematik;

    Sammanfattning : This thesis treats a range of stochastic methods with various applications, most notably in finance. It is comprised of five articles, and a summary of the key concepts and results these are built on.The first two papers consider a jump-to-default model, which is a model where some quantity, e.g. LÄS MER

  7. 10. Divided Exhaust Period on Heavy-Duty Diesel Engines

    Författare :Stefan Gundmalm; Hans-Erik Ångström; Fredrik Ekström; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : Due to growing concerns regarding global energy security and environmental sustainability it is becoming increasingly important to increase the energy efficiency of the transport sector. The internal combustion engine will probably continue to be the main propulsion system for road transportation for many years to come. LÄS MER