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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Factorization theory for Toeplitz plus Hankel operators and singular integral operators with flip

Ehrhardt, Torsten. January 2004 (has links) (PDF)
Chemnitz, Techn. University, Habil.-Schr., 2004.
2

Second kind integral equations on the real line solvability and numerical analysis in weighted spaces /

Haseloh, Kai. January 2004 (has links) (PDF)
Hannover, University, Diss., 2004.
3

Modules de Fredholm finiment sommables sur les groupes hyperboliques / Finitely summable Fredholm modules over hyperbolic groups

Cabrera, Jean-Marie 14 March 2019 (has links)
Le présent travail est une contribution à la K-théorie bivariante des C*-algèbres au sens de Kasparov, et en particulier à sa version équivariante. Un rôle clé dans cette théorie est joué par l'élément"gamma" de Kasparov, une sorte de classe fondamentale équivariante d'un groupe localement compact. On s'intéresse à la représenter par desK-cycles (modules de Fredholm) possédant de bonnes propriétés.Dans cette thèse on donne une nouvelle construction de tels K-cyclespour les groupes hyperboliques au sens de Gromov. Les modules de Fredholm obtenus sont finiment sommables, i.e. ils possèdent une propriété de régularité particulièrement forte. On donne aussi une majoration de leur degré minimal de sommabilité.On s'inspire des travaux de V. Lafforgue: les K-cycles considérés sontsimilaires à ceux utilisés par Lafforgue dans sa démonstration de la Conjecture de Baum-Connes à coefficients pour les groupes hyperboliques. Leur construction est basée sur les idées de Mineyev sur les "bicombings homologiques" des groupes hyperboliques et procède par récurrence sur les squelettes d'un complexe de Rips associé au groupe.Une preuve non-constructive de la sommabilité finie d'un élément "gamma"a été obtenue par Emerson et Nica pour les groupes hyperboliques decaractéristique d'Euler-Poincaré zéro. Des constructions explicites deK-cycles représentant l'élément "gamma" d'un groupe hyperbolique ont étédonnées par Kasparov-Skandalis et V. Lafforgue, mais on ne sait passi leurs modules sont finiment sommables. En général, on ne peut pasespérer trouver des éléments "gamma" finiment sommables pour d'autresclasses de groupes discrets. / This work is a contribution to the bivariant K-theory of C*-algebras in the sense of Kasparov and in particular to its equivariant version. In this theory, a key role is played by Kasparov’s “gamma”-element, a kind of equivariant fundamental equivariant class for a locally compact group. It is of interest to find particularly well behaved K-cycles (Fredholm modules) representing this class.We present a new construction of K-cycles representing a "gamma"-element for hyperbolic groups in the sens of Gromov. The Fredholm modules obtained are finitely summable i.e. they possess particularly strong regularity properties. We also obtain an upper bound of their minimal degree of summability.Our approach is inspired by the work of V. Lafforgue: the K-cycles under consideration are similar to those used by Lafforgue in his demonstration of Baum-Connes conjecture with coefficients for hyperbolic groups. Their construction is based on Mineyev’s ideas on homological bicombings and proceeds by induction over the skeleta of a Rips complex associated to the group.A non-constructive proof of the finite summablity of a “gamma” element was obtained by Emerson and Nica for the hyperbolic groups of Euler-Poincaré characteristic zero. Explicit constructions of K-cycles representing the “gamma”-element of hyperbolic groups were given by Kasparov-Skandalis and V. Lafforgue, but it is not known whether their modules are finitely summable. In general one cannot hope to find finitely summable “gamma” elements for other classes of discrete groups.
4

Integralekvationer

Smeds, Fredrik January 2005 (has links)
<p><p>Denna skrift är huvudsakligen en översättning av delar av kompendiet <em>Integral Equations</em> av Yury V. Shestopalov och Yury G. Smirnov (Karlstads universitet 2002), till vilken jag bifogat några egna exempel och en biografi över Ivar Fredholm. Skriften är författad i början av 2005, då jag läste kursen "Integralekvationer" för Yury Shestopalov.</p></p>
5

Integralekvationer

Smeds, Fredrik January 2005 (has links)
Denna skrift är huvudsakligen en översättning av delar av kompendiet Integral Equations av Yury V. Shestopalov och Yury G. Smirnov (Karlstads universitet 2002), till vilken jag bifogat några egna exempel och en biografi över Ivar Fredholm. Skriften är författad i början av 2005, då jag läste kursen "Integralekvationer" för Yury Shestopalov.
6

GPU parallelization of the Mishchenko method for solving Fredholm equations of the first kind

Nordström, Johan January 2015 (has links)
Fredholm integral equations of the first kind are known to be ill-posed and may be impossible to solve analytically. A. S. Mishchenko et al. have developed a method to generate numerical solutions to Fredholm equations which occurs in physics. Mischenko's method is a Monte Carlo method which can run in parallel. The purpose of this project was to investigate how a parallel version of the Mishchenko method can be implemented on a Graphics Processing Unit (GPU). The developed program uses the CUDA platform for GPU programming. The conclusion of the project is that it is definitely possible to implement the Mishchenko method on a GPU. However, some properties of the algorithm are not optimal for the GPU. A more thorough analysis of the implementation is needed to get a complete understanding of the performance and the bottlenecks.
7

Investigation of the feasibility of determining the Ozone distribution in a Rayleigh atmosphere by solution of a Fredholm integral equation

Ramos, James Rose, 1936- January 1967 (has links)
No description available.
8

Über die Splitting-Eigenschaft der Approximationszahlen von Matrix-Folgen : l1-Theorie$nElektronische Ressource /

Seidel, Markus, Silbermann, Bernd. January 2006 (has links)
Chemnitz, Techn. Univ., Diplomarb., 2006.
9

Dichotomy theorems for evolution equations

Pogan, Alexandru Alin, January 2008 (has links)
Thesis (Ph. D.)--University of Missouri-Columbia, 2008. / The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on June 22, 2009) Vita. Includes bibliographical references.
10

Some problems in algebraic topology : Fredholm maps and GLc(E) structures

Elworthy, K. D. January 1967 (has links)
No description available.

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