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11,448 research outcomes, page 1 of 1,145
  • publication . Article . Preprint . 2015
    Open Access
    Authors:
    Wensheng Kang; Ronald A. Ratti; Kyung Hwan Yoon;
    Publisher: Elsevier BV

    AbstractA mixture innovation time-varying parameter VAR model is used to examine the impact of structural oil price shocks on U.S. stock market return. Time variation is evident in both the coefficients and the variance–covariance matrix. The standard deviations of the ...

  • publication . Article . Conference object . Preprint . 2010
    Open Access English
    Authors:
    Hultman, Axel;
    Publisher: Elsevier Inc.

    Let $G$ be a connected reductive linear algebraic group over $\C$ with an involution $\theta$. Denote by $K$ the subgroup of fixed points. In certain cases, the $K$-orbits in the flag variety $G/B$ are indexed by the twisted identities $\iot = \{\theta(w^{-1})w\mid w\in...

  • publication . Article . Preprint . 2007
    Open Access English
    Authors:
    Bass, Richard F.; Tang, Huili;
    Publisher: Elsevier B.V.
    Project: NSF | Analysis of multidimensio... (0601783)

    Let $\alpha\in (0,2)$ and consider the operator $$L f(x) =\int [f(x+h)-f(x)-1_{(|h|\leq 1)} \nabla f(x)\cdot h] \frac{A(x,h)}{|h|^{d+\alpha}} dh, $$ where the $\nabla f(x)\cdot h$ term is omitted if $\alpha<1$. We consider the martingale problem corresponding to the ope...

  • publication . Article . Preprint . 2007
    Open Access
    Authors:
    Duflo, Michel; Petracci, Emanuela;
    Publisher: Elsevier BV

    Comment: Accepted for publication in Journal of Algebra, special volume in honour of E.B. Vinberg (32 pages)

  • publication . Preprint . Article . 2011
    Open Access English
    Authors:
    Karol Szczypkowski;

    Abstract We give upper and lower bounds of perturbation series for transition densities, corresponding to additive gradient perturbations satisfying certain space–time integrability conditions.

  • publication . Article . Preprint . 2009
    Open Access
    Authors:
    Oldřich Spáčil;
    Publisher: Elsevier BV

    Methods of parabolic geometries have been recently used to construct a class of elliptic complexes on quaternionic manifolds, the Salamon's complex being the simplest case. The purpose of this paper is to describe an algorithm how to compute their analytical indices in ...

  • publication . Article . Preprint . 2010
    Open Access
    Authors:
    Bardet, Jean-Marc; Tudor, Ciprian,;
    Publisher: Elsevier BV

    International audience; By using chaos expansion into multiple stochastic integrals, we make a wavelet analysis of two self-similar stochastic processes: the fractional Brownian motion and the Rosenblatt process. We study the asymptotic behavior of the statistic based o...

  • publication . Article . Preprint . 2005
    Open Access English
    Authors:
    George Androulakis;
    Publisher: Elsevier Inc.

    The method of compatible sequences is introduced in order to produce non-trivial (closed) invariant subspaces of (bounded linear) operators. Also a topological tool is used which is new in the search of invariant subspaces: the extraction of continuous selections of low...

  • publication . Article . Preprint . 2002
    Open Access
    Authors:
    Ralf Lämmel;
    Publisher: Elsevier BV

    A typed model of strategic term rewriting is developed. The key innovation is that generic traversal is covered. To this end, we define a typed rewriting calculus S'_{gamma}. The calculus employs a many-sorted type system extended by designated generic strategy types ga...

  • publication . Article . Other literature type . Preprint . 2010
    Open Access
    Authors:
    Roberto Tauraso;
    Publisher: Elsevier BV

    Let p be a prime and let a be a positive integer. In this paper we determine $\sum_{k=0}^{p^a-1}\binom{2k}{k+d}/m^k$ and $\sum_{k=1}^{p-1}\binom{2k}{k+d}/(km^{k-1})$ modulo $p$ for all d=0,...,p^a, where m is any integer not divisible by p. For example, we show that if ...

11,448 research outcomes, page 1 of 1,145
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