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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    BIT 31 (1991), S. 2-14 
    ISSN: 1572-9125
    Keywords: E.1 ; F.2.2 ; computational geometry ; intersection detection ; geometric duality ; multidimensional search ; hyperplane-polyhedron intersection ; polyhedron-polyhedron intersection ; arbitrary dimensions ; linear programming
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract This paper presents a dual approach to detect intersections of hyperplanes and convex polyhedra in arbitrary dimensions. Ind dimensions, the time complexities of the dual algorithms areO(2 d logn) for the hyperplane-polyhedron intersection problem, andO((2d) d−1 log d−1 n) for the polyhedron- polyhedron intersection problem. These results are the first of their kind ford 〉 3. In two dimensions, these time bounds are achieved with linear space and preprocessing. In three dimensions, the hyperplane-polyhedron intersection problem is also solved with linear space and preprocessing; quadratic space and preprocessing, however, is required for the polyhedron-polyhedron intersection problem. For generald, the dual algorithms require $$O(n^{2^d } )$$ space and preprocessing. All of these results readily extend to unbounded polyhedra.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Algorithmica 6 (1991), S. 466-478 
    ISSN: 1432-0541
    Keywords: Neural network ; Simulated annealing ; Diffusion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Mathematics
    Notes: Abstract The first purpose of this paper is to present a class of algorithms for finding the global minimum of a continuous-variable function defined on a hypercube. These algorithms, based on both diffusion processes and simulated annealing, are implementable as analog integrated circuits. Such circuits can be viewed as generalizations of neural networks of the Hopfield type, and are called “diffusion machines.” Our second objective is to show that “learning” in these networks can be achieved by a set of three interconnected diffusion machines: one that learns, one to model the desired behavior, and one to compute the weight changes.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 381 (1996), S. 187-188 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] EVERYWHERE in the industrial West there are pressures to reduce public funding for basic research in favour of more applied work. In part, the pressures are due to a change in the public perception of the benefits of basic research. But even those who understand the value of basic research often ...
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Communications in mathematical physics 147 (1992), S. 253-275 
    ISSN: 1432-0916
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Physics
    Notes: Abstract We provide an intrinsic description of N-super Riemann surfaces and TN-semirigid surfaces. Semirigid surfaces occur naturally in the description of topological gravity as well as topological supergravity. We show that such surfaces are obtained by an integrable reduction of the structure group of a complex supermanifold. We also discuss the supermoduli spaces of TN-semirigid surfaces and their relation to the moduli spaces of N-super Riemann surfaces.
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Probability theory and related fields 82 (1989), S. 137-154 
    ISSN: 1432-2064
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Summary A natural definition of the Markov property for multi-parameter random processes (random fields) is the following. Let {X t,t∈ℝ N } be a multiparameter process. For any set D in ℝN let σ D denote the σ-field generated by {X t , t∈D}. The field {X t,t∈D} is said to be Markov (or Markov of degree 1 [6], or sharp Markov) if, for any bounded open set D with smooth boundary, σ D and σ D c are conditionally independent given σ δD . It has been known for some time that to find interesting examples of Markov processes under this definition; it is necessary to consider generalized random functions. In this paper we show that a natural framework for the Markov property of multiparameter processes is a class of generalized random differential forms (i.e., random currents). Our principal objective is to relate the Markovian nature of an isotropic gaussian current to its spectral properties.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Probability theory and related fields 54 (1980), S. 313-330 
    ISSN: 1432-2064
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Probability theory and related fields 63 (1983), S. 349-368 
    ISSN: 1432-2064
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Summary Multiple stochastic integrals are defined relative to a class of sets. The classic cases of multiple Wiener integral and Ito integral (as well as its generalization by Wong-Zakai-Yor) are recovered by specializing the class of sets appropriately. Any square-integrable functional of the Wiener process has a canonical representation in terms of the integrals. Formulas are given for projecting a stochastic integral onto the space of Wiener functionals and for representing multiple stochastic integrals as iterated integrals. Applications to a change in probability measure arising in a signal detection problem are given.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Probability theory and related fields 74 (1987), S. 429-453 
    ISSN: 1432-2064
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Probability theory and related fields 29 (1974), S. 109-122 
    ISSN: 1432-2064
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Probability theory and related fields 4 (1965), S. 103-112 
    ISSN: 1432-2064
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
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