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  • 1
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Analytical Biochemistry 208 (1993), S. 255-259 
    ISSN: 0003-2697
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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  • 2
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Environmental Pollution 84 (1994), S. 159-166 
    ISSN: 0269-7491
    Keywords: children ; dust ; lead ; pollution ; soil
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Computing 48 (1992), S. 109-123 
    ISSN: 1436-5057
    Keywords: 65F15 ; Symmetric eigenvalue problems ; divide-and-conquer algorithms ; parallel algorithms ; computational complexity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Description / Table of Contents: Zusammenfassung Wir schlagen eine Modifikation der derzeitigen Divide-and-Conquer-Algorithmen aus [3] zur näherungsweisen Berechnung der Eigenwerte einer reelen symmetrischen Matrix vor. Dabei vermeiden wir die numerischen Stabilitätsprobleme dieser Algorithmen, erhalten aber ihre Unempfindlichkeit gegen das Auftreten von Eigenwerthaufen; wir können auch für unsere Modifikation a-priori Schranken für den Berechnungsaufwand für beliebige Matrizen angeben. Die theoretische Effizienz unseres Algorithmus bestätigen wir durch numerische Experimente.
    Notes: Abstract We present a practical modification of the recent divide-and-conquer algorithms of [3] for approximating the eigenvalues of a real symmetric tridiagonal matrix. In this modified version, we avoid the numerical stability problems of the algorithms of [3] but preserve their insensitivity to clustering the eigenvalues and the possibility to give a priori upper bounds on their computational cost for any input matrix. We confirm the theoretical effectiveness of our algorithms by numerical experiments.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Combinatorica 8 (1988), S. 189-200 
    ISSN: 1439-6912
    Keywords: 05 C 68
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract Our main result improves the known processor bound by a factor ofn 4 (maintaining the expected parallel running time,O(log3 n)) for the following important problem:find a perfect matching in a general or in a bipartite graph with n vertices. A solution to that problem is used in parallel algorithms for several combinatorial problems, in particular for the problems of finding i) a (perfect) matching of maximum weight, ii) a maximum cardinality matching, iii) a matching of maximum vertex weight, iv) a maximums-t flow in a digraph with unit edge capacities. Consequently the known algorithms for those problems are substantially improved.
    Type of Medium: Electronic Resource
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