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  • 1
    Electronic Resource
    Electronic Resource
    Pivoting techniques for symmetric Gaussian elimination (1977)
    Springer
    Numerische Mathematik 28 (1977), S. 221-241 
    Details
    ISSN: 0945-3245
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Summary In order to factorize an indefinite symmetric matrixG of the formG=LDL T whereL is a trivially invertible matrix andD is a diagonal matrix, we introduce a new kind of pivoting operation. The algorithm suggested maintains the stability and efficiency of the standard Cholesky decomposition whileG need not be positive definite. The problem of factorizingG+αuu T whereu is a vector, α scalar and the factors ofG are known, is also discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01394454
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    The influence of metamemory on transfer and durability of memory tasks
    Amsterdam : Elsevier
    Learning and Individual Differences 4 (1992), S. 91-102 
    Details
    ISSN: 1041-6080
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Education , Psychology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/1041-6080(92)90007-2
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Least-square acceleration of iterative methods for linear equations (1974)
    Springer
    Journal of optimization theory and applications 14 (1974), S. 431-437 
    Details
    ISSN: 1573-2878
    Keywords: Linear systems ; iterative methods ; least-square methods ; acceleration methods
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract Ordinary iteration schemes for solving linear algebraic equations are one-step, i.e., only the last iterant is used in order to compute the following one. This note advocates the use of several iterants by means of least-square acceleration. The resulting scheme is easy to implement and is very effective in cases where the basic iteration matrix is close to symmetric. The note provides theoretical estimates for the rate of convergence as well as a numerical example. The example deals with the numerical solution of Poisson's equation in a rectangular annulus, by five-point formulae, using the alternating-direction method.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00933309
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Numerical solution of the equations of compressible flow by a transport method (1990)
    New York, NY [u.a.] : Wiley-Blackwell
    Numerical Methods for Partial Differential Equations 6 (1990), S. 245-261 
    Details
    ISSN: 0749-159X
    Keywords: Mathematics and Statistics ; Numerical Methods
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics
    Notes: This paper implements a numerical solution of the equations of compressible flow, by a transport method. The model is based on a kinetic model, built for the fluid motion. It transforms the equations of motion into integral equations, solved by an analytical-numerical method. Precomputation of tables for some canonical integrals reduces the amount of work. A boundary value problem (flow into a wedge) is treated and numerical solutions are exhibited. The paper deals with isentropic flow. It is an important special case, among the variety of problems where the assumption of constant entropy causes a negligible error.
    Additional Material: 14 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/num.1690060305
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    Paper (German National Licenses)
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