Results 21 to 30 of about 437 (57)

Wiener-Hopf operators in higher dimensions: the Widom conjecture for piece-wise smooth domains

open access: yes, 2014
We prove a two-term quasi-classical trace asymptotic formula for the functions of multi-dimensional Wiener-Hopf operators with discontinuous symbols. The discontinuities occur on the surfaces which are assumed to be piece-wise smooth.
Sobolev, A. V.
core   +1 more source

On Multi-Dimensional Random Walk Models Approximating Symmetric Space-Fractional Diffusion Processes [PDF]

open access: yes, 2005
Mathematics Subject Classification: 26A33, 47B06, 47G30, 60G50, 60G52, 60G60.In this paper the multi-dimensional analog of the Gillis-Weiss random walk model is studied.
Gorenflo, Rudolf, Umarov, Sabir
core  

Bilinear pseudo-differential operators with exotic symbols, II

open access: yes, 2018
The boundedness from $H^p \times L^2$ to $L^r$, $1/p+1/2=1/r$, and from $H^p \times L^{\infty}$ to $L^p$ of bilinear pseudo-differential operators is proved under the assumption that their symbols are in the bilinear H\"ormander class $BS^m_{\rho,\rho}$,
Miyachi, Akihiko, Tomita, Naohito
core   +1 more source

Rigidity results for some boundary quasilinear phase transitions

open access: yes, 2008
We consider a quasilinear equation given in the half-space, i.e. a so called boundary reaction problem. Our concerns are a geometric Poincar\'e inequality and, as a byproduct of this inequality, a result on the symmetry of low-dimensional bounded stable ...
Sire, Yannick, Valdinoci, Enrico
core   +2 more sources

A topological definition of the Maslov bundle [PDF]

open access: yes, 2006
We give a definition of the Maslov fibre bundle for a lagrangian submanifold of the cotangent bundle of a smooth manofold. This definition generelizes the definition given, in homotopic terms, by Arnol'd for lagrangian submanifolds of the cotangent ...
Anné, Colette
core   +2 more sources

$L_2$-Small Deviations for Weighted Stationary Processes

open access: yes, 2018
We find logarithmic asymptotics of $L_2$-small deviation probabilities for weighted stationary Gaussian processes (both for real and complex-valued) having power-type discrete or continuous spectrum.
Lifshits, Mikhail, Nazarov, Alexander
core   +1 more source

L^p(R^n)-continuity of translation invariant anisotropic pseudodifferential operators: a necessary condition

open access: yes, 2014
We consider certain anisotropic translation invariant pseudodifferential operators, belonging to a class denoted by $\mathrm{op}(\mathcal{M}^{\lambda}_{\psi})$, where $\lambda$ and $\psi=(\psi_1,\dots,\psi_n)$ are the "order" and "weight" functions ...
Coriasco, S., Murdocca, M.
core   +1 more source

The K-theory of bisingular pseudodifferential algebras

open access: yes, 2015
In this paper we calculate the K-theory of $C^{\ast}$-algebras given by the norm-closures of spaces of bisingular pseudodifferential operators.
Bohlen, Karsten
core   +1 more source

On a high-dimensional nonlinear stochastic partial differential equation [PDF]

open access: yes, 2011
In this paper we investigate a nonlinear stochastic partial differential equation (spde in short) perturbed by a space-correlated Gaussian noise in arbitrary dimension $d\geq1$, with a non-Lipschitz coefficient noisy term.
Boulanba, Lahcen, Mellouk, Mohamed
core   +2 more sources

A few remarks on time-frequency analysis of Gevrey, analytic and ultra-analytic functions

open access: yes, 2012
We give a brief survey of recent results concerning almost diagonalization of pseudodifferential operators via Gabor frames. Moreover, we show new connections between symbols with Gevrey, analytic or ultra-analityc regularity and time-frequency analysis ...
Cordero, Elena   +2 more
core   +1 more source

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