Sökning: "normal form"

Visar resultat 1 - 5 av 748 avhandlingar innehållade orden normal form.

  1. 1. Computer-aided Computation of Abelian integrals and Robust Normal Forms

    Författare :Tomas Johnson; Warwick Tucker; Lars-Erik Persson; John H. Hubbard; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Ordinary differential equations; parameter estimation; planar Hamiltonian systems; bifurcation theory; Abelian integrals; limit cycles; normal forms; hyperbolic fixed points; numerical integration; invariant manifolds; interval analysis. 2000 Mathematics Subject Classification. 34A60; 34C07; 34C20; 37D10; 37G15; 37M20; 37M99; 65G20; 65L09; 65L70.; MATHEMATICS; MATEMATIK; matematik; Mathematics;

    Sammanfattning : This PhD thesis consists of a summary and seven papers, where various applications of auto-validated computations are studied. In the first paper we describe a rigorous method to determine unknown parameters in a system of ordinary differential equations from measured data with known bounds on the noise of the measurements. LÄS MER

  3. 2. Problems in the Classification Theory of Non-Associative Simple Algebras

    Författare :Erik Darpö; Ernst Dieterich; Karl-Heinz Fieseler; William Crawley-Boevey; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Division algebra; flexible algebra; normal form; composition algebra; absolute valued algebra; vector product; rotation.; MATHEMATICS; MATEMATIK;

    Sammanfattning : In spite of its 150 years history, the problem of classifying all finite-dimensional division algebras over a field k is still unsolved whenever k is not algebraically closed. The present thesis concerns some different aspects of this problem, and the related problems of classifying all composition and absolute valued algebras. LÄS MER

  4. 3. Ett fett liv : En artikulering av viktordningen på bas av överviktiga människors erfarenheter

    Författare :Aimée Ekman; Bengt Richt; Gunilla Tegern; Eklina Oinas; Linköpings universitet; []
    Nyckelord :The weight order; ordering; form; action perspective; grounded theory; fat studies; critical perspective; fatness; overweight; body weight; experience; Viktordningen; ordnande; form; handlingsperspektiv; grounded theory; fat studies; kritisk fetma forskning; fetma; övervikt; kroppsvikt; erfarenhet;

    Sammanfattning : Syftet med den här avhandlingen är att utveckla en begreppslig och teoretiserande förståelse för villkor och möjligheter i överviktiga personers handlingsliv. Med utgångspunkt i intervjuer med femton feta svenskar har slutpunkten för studien kommit att bli en artikulering av processer och subprocesser inom viktordningen. LÄS MER

  5. 4. La fórmula de tratamiento usted como marcador étnico del habla : Sus correlaciones con algunos factores de la tríada ecológica en contexto de etnias en contacto

    Författare :Miguel Angel Sarmiento; Johan Falk; Diana Bravo; Hernán Urrutia; Stockholms universitet; []
    Nyckelord :HUMANIORA; HUMANITIES; majority group; minority group; politeness; address form usted; learning; culture; social psychology; Theory of Planned Action; Accomodation Theory; Theory of Rejection-Identification; Theory of Adaptive Control of Thought; Social Cognitive Theory; Theory of Ecological Systems; cognitive context; ethnic marker in speech; ethnic contact; behaviour; intention; assumptions; beliefs; ethnic identity; usted; attitudes; perceptions; Ecological Triad; Spanish language; Spanska språket;

    Sammanfattning : This study aims at exploring the social, affective and cognitive variables that would be related to the use of the address form usted in Chilean Spanish. Specifically, we refer to the use that can be observed in interactions between Chileans residing in Sweden. LÄS MER

  7. 5. On the asymptotic spectral distribution of random matrices : closed form solutions using free independence

    Författare :Jolanta Maria Pielaszkiewicz; Dietrich von Rosen; Martin Singull; Maciej A. Nowak; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Spectral distribution; R-transform; Stieltjes transform; Free probability; Freeness; Asymptotic freeness;

    Sammanfattning : The spectral distribution function of random matrices is an information-carrying object widely studied within Random matrix theory. In this thesis we combine the results of the theory together with the idea of free independence introduced by Voiculescu (1985). LÄS MER