5,671 research outputs found

    On the permanent of random Bernoulli matrices

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    We show that the permanent of an n×nn \times n matrix with iid Bernoulli entries ±1\pm 1 is of magnitude n(1/2+o(1))nn^{({1/2}+o(1))n} with probability 1−o(1)1-o(1). In particular, it is almost surely non-zero

    Central limit theorems for Gaussian polytopes

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    Choose nn random, independent points in Rd\R^d according to the standard normal distribution. Their convex hull KnK_n is the {\sl Gaussian random polytope}. We prove that the volume and the number of faces of KnK_n satisfy the central limit theorem, settling a well known conjecture in the field.Comment: to appear in Annals of Probabilit

    The Topology of Foliations Formed by the Generic K-Orbits of a Subclass of the Indecomposable MD5-Groups

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    The present paper is a continuation of [13], [14] of the authors. Specifically, the paper considers the MD5-foliations associated to connected and simply connected MD5-groups such that their Lie algebras have 4-dimensional commutative derived ideal. In the paper, we give the topological classification of all considered MD5-foliations. A description of these foliations by certain fibrations or suitable actions of R2\mathbb{R}^{2} and the Connes' C*-algebras of the foliations which come from fibrations are also given in the paper.Comment: 20 pages, no figur
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