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  • Electronic Resource  (2)
  • 1995-1999  (2)
  • 53C21  (1)
  • BFGS algorithm  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Computing 55 (1995), S. 125-133 
    ISSN: 1436-5057
    Keywords: 49M37 ; 90C30 ; BFGS algorithm ; unconstrained optimization ; superlinear convergence ; parallel method
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Description / Table of Contents: Zusammenfassung Dieser Beitrag stellt ein asynchron paralleles Quasi-Newton-Verfahren vor. Wir setzen voraus, daß esp+q Prozessoren gibt, die in zwei Gruppen geteilt sind. Die beiden Gruppen arbeiten asynchron parallel. Wenn die Zielfunktion zweimal stetig differenzierbar und gleichmäßig konvex ist, beweisen wir, daß die vom Verfahren erzeugte Iterationsfolge zur Optimallösung global und superlinear konvergiert.
    Notes: Abstract In this paper, we present an asynchronous parallel quasi-Newton method. We assume that we havep+q processors, which are divided into two groups, the two groups execute in an asynchronous parallel fashion. If we assume that the objective function is twice continuously differentiable and uniformly convex, we discuss the global and superlinear convergence of the parallel BFGS method. Finally we show numerical results of this algorithm.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Probability theory and related fields 101 (1995), S. 251-276 
    ISSN: 1432-2064
    Keywords: 35J65 ; 60J65 ; 53C21
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Summary We give sufficient conditions for the existence of positive solutions to some semilinear elliptic equations in unbounded Lipschitz domainsD ⊂ ℝ d (d≥3), having compact boundary, with nonlinear Neumann boundary conditions on the boundary ofD. For this we use an implicit probabilistic representation, Schauder's fixed point theorem, and a recently proved Sobolev inequality forW 1,2(D). Special cases include equations arising from the study of pattern formation in various models in mathematical biology and from problems in geometry concerning the conformal deformation of metrics.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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