Results 71 to 80 of about 7,777 (145)

Long‐time existence of Brownian motion on configurations of two landmarks

open access: yesBulletin of the London Mathematical Society, Volume 56, Issue 5, Page 1658-1679, May 2024.
Abstract We study Brownian motion on the space of distinct landmarks in Rd$\mathbb {R}^d$, considered as a homogeneous space with a Riemannian metric inherited from a right‐invariant metric on the diffeomorphism group. As of yet, there is no proof of long‐time existence of this process, despite its fundamental importance in statistical shape analysis ...
Karen Habermann   +2 more
wiley   +1 more source

Bott‐integrable Reeb flows on 3‐manifolds

open access: yesJournal of the London Mathematical Society, Volume 109, Issue 1, January 2024.
Abstract This paper is devoted to studying a notion of Bott integrability for Reeb flows on contact 3‐manifolds. We show, in analogy with work of Fomenko–Zieschang on Hamiltonian flows in dimension 4, that Bott‐integrable Reeb flows exist precisely on graph manifolds.
Hansjörg Geiges   +2 more
wiley   +1 more source

The extended hypergeometric class of L\'evy processes

open access: yes, 2014
With a view to computing fluctuation identities related to stable processes, we review and extend the class of hypergeometric L\'evy processes explored in Kuznetsov and Pardo (arXiv:1012.0817).
Kyprianou, A. E.   +2 more
core   +1 more source

The Solvability and Explicit Solutions of Singular Integral–Differential Equations with Reflection

open access: yesAbstract and Applied Analysis, Volume 2024, Issue 1, 2024.
This article deals with a classes of singular integral–differential equations with convolution kernel and reflection. By means of the theory of boundary value problems of analytic functions and the theory of Fourier analysis, such equations can be transformed into Riemann boundary value problems (i.e., Riemann–Hilbert problems) with nodes and ...
A. S. Nagdy   +3 more
wiley   +1 more source

A note on Wiener-Hopf factorization for Markov Additive processes

open access: yes, 2011
We prove the Wiener-Hopf factorization for Markov Additive processes. We derive also Spitzer-Rogozin theorem for this class of processes which serves for obtaining Kendall's formula and Fristedt representation of the cumulant matrix of the ladder epoch ...
Klusik, Przemyslaw, Palmowski, Zbigniew
core   +1 more source

On the solvability of boundary value problem for mixed-type equation with a singular coefficient

open access: yesVestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2014
In this paper we study a problem with conditions on the inner characteristic and on some parts of the degeneration line for mixed type equation with singular coefficient in unbounded domain.
Menglibay Kh Ruziev
doaj   +1 more source

Characterization of a Resistive Half Plane over a Resistive Sheet

open access: yes, 1993
The diffraction of a resistive half plane over a planar resistive sheet under plane wave illum1ination is determined via the dual integral equation method (a variation of the Wiener-Hopf method).
Natzke, John R., Volakis, John L.
core  

Numerical solution of scattering problems using a Riemann--Hilbert formulation [PDF]

open access: yes, 2019
A fast and accurate numerical method for the solution of scalar and matrix Wiener--Hopf problems is presented. The Wiener--Hopf problems are formulated as Riemann--Hilbert problems on the real line, and a numerical approach developed for these problems ...
Luca, Elena, Smith, Stefan G. Llewellyn
core   +2 more sources

F-electron spectral function of the Falicov-Kimball model and the Wiener-Hopf sum equation approach

open access: yesCondensed Matter Physics, 2008
We derive an alternative representation for the f-electron spectral function of the Falicov-Kimball model from the original one proposed by Brandt and Urbanek.
A.M. Shvaika, J.K. Freericks
doaj   +1 more source

A trifurcated waveguide problem II [PDF]

open access: yes, 1994
We consider the diffraction of the dominant plane wave mode which propagates out of the end of a semi-infinite waveguide. This waveguide is made up of a half plane with a Dirichlet boundary condition and a half plane with a Neumann boundary condition ...
Rawlins, A D
core  

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