Results 61 to 70 of about 10,897,824 (131)

Change Point Analysis for Functional Data Using Empirical Characteristic Functionals

Journal of Time Series Analysis, Volume 47, Issue 3, Page 612-631, May 2026.
ABSTRACT We develop a new method to detect change points in the distribution of functional data based on integrated CUSUM processes of empirical characteristic functionals. Asymptotic results are presented under conditions allowing for low‐order moments and serial dependence in the data establishing the limiting null‐distribution of the proposed test ...
Lajos Horváth, Gregory Rice, Jeremy VanderDoes   +2 more
wiley   +1 more source

A Riemann–Hilbert problem for biorthogonal polynomials [PDF]

, 2005
We characterize the biorthogonal polynomials that appear in the theory of coupled random matrices via a Riemann–Hilbert problem. Our Riemann–Hilbert problem is different from the ones that were proposed recently by Ercolani and McLaughlin, Kapaev, and ...
McLaughlin, K.T.-R., Kuijlaars, A.B.J.
core   +1 more source

Logarithmic capacity and Riemann and Hilbert problems for generalized analytic functions

Доповiдi Нацiональної академiї наук України
The study of the Dirichlet problem with arbitrary measurable boundary data for harmonic functions in the unit disk is due to the famous Luzin dissertation.
V.Ya. Gutlyanskiĭ, O.V. Nesmelova, V.I. Ryazanov, A.S. Yefimushkin   +3 more
doaj   +1 more source

Riemann Hypothesis in Special Cases [PDF]

, 2004
In this note, we show that the Riemann Hypothesis is true in some special ...
Hassani, Mehdi
core   +2 more sources

On boundary-value problems for generalized analytic and harmonic functions

Доповiдi Нацiональної академiї наук України
The present paper is a natural continuation of our last articles on the Riemann, Hilbert, Dirichlet, Poincaré, and, in particular, Neumann boundary-value problems for quasiconformal, analytic, harmonic functions and the so-called A-harmonic functions ...
V.Ya. Gutlyanskiĭ, O.V. Nesmelova, V.I. Ryazanov, A.S. Yefimushkin   +3 more
doaj   +1 more source

Scalar and matrix Riemann–Hilbert approach to the strong asymptotics of Padé approximants and complex orthogonal polynomials with varying weight [PDF]

, 2004
We describe methods for the derivation of strong asymptotics for the denominator polynomials and the remainder of Padé approximants for a Markov function with a complex and varying weight.
Aptekarev, A.I, Van Assche, W
core   +1 more source

Riemann--Hilbert problem approach for two-dimensional flow inverse scattering

, 2014
International audienceWe consider inverse scattering for the time-harmonic wave equation with first-order perturbation in two dimensions. This problem arises in particular in the acoustic tomography of moving fluid.
Agaltsov, Alexey, Novikov, Roman
core   +2 more sources

Matrix Orthogonal Polynomials: A Riemann--Hilbert approach

, 2023
In this work we show how to get advantage from the Riemann--Hilbert analysis in order to obtain information about the matrix orthogonal polynomials and functions of second kind associated with a weight matrix.
Mañas, Manuel, Foulquié-Moreno, Ana, Fradi, Assil, Branquinho, Amílcar   +3 more
core  

Response of a Fermi gas to time-dependent perturbations: Riemann-Hilbert approach at nonzero temperatures

, 2006
We provide an exact finite temperature extension to the recently developed Riemann-Hilbert approach for the calculation of response functions in nonadiabatically perturbed (multichannel) Fermi gases. We give a precise definition of the finite temperature
Braunecker, B
core   +1 more source

Variable-Coefficient Fractional High-Order Nonlinear Models: Establishment and Solutions

Fractal and Fractional
This work extends the analytical operation of the Riemann–RHPHilbert approach (RHA) for fractional-order nonlinear integrable systems under the solvable meaning of inverse scattering transform (IST) to variable-coefficient fractional-order nonlinear ...
Chunxia An, Jinling Zhang, Sheng Zhang
doaj   +1 more source