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  • 1
    Electronic Resource
    Electronic Resource
    On the Convergence Rate of a Preconditioned Subspace Eigensolver (1999)
    Springer
    Computing 63 (1999), S. 219-231 
    Details
    ISSN: 1436-5057
    Keywords: AMS Subject Classifications:65F15. ; Key words.Eigenvalue problems, convergence rate, Generalized Davidson.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Notes: Abstract. In this paper we present a proof of convergence for a preconditioned subspace method which shows the dependency of the convergence rate on the preconditioner used. This convergence rate depends only on the condition of the pre-conditioned system $ \kappa _{2}(MA) $ and the relative separation of the first two eigenvalues $ 1-\lambda _{1}/\lambda _{2} $ . This means that, for example, multigrid preconditioners can be used to find eigenvalues of elliptic PDE's at a grid-independent rate.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s006070050032
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    Paper (German National Licenses)
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    Newtonian perturbations on models with matter creation (2011)
    American Physical Society (APS)
    Details
    Publication Date: 2011-09-10
    Description: Author(s): J. F. Jesus, F. A. Oliveira, S. Basilakos, and J. A. S. Lima Creation of cold dark matter (CCDM) can macroscopically be described by a negative pressure, and, therefore, the mechanism is capable to accelerate the Universe, without the need of an additional dark energy component. In this framework, we discuss the evolution of perturbations by considering a Neo... [Phys. Rev. D 84, 063511] Published Fri Sep 09, 2011
    Keywords: Astrophysics & Cosmology
    Print ISSN: 0556-2821
    Electronic ISSN: 1089-4918
    Topics: Physics
    Published by American Physical Society (APS)
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