Results 81 to 90 of about 16,811 (181)

Riemann Hypothesis in Special Cases

open access: yes, 2004
In this note, we show that the Riemann Hypothesis is true in some special ...
Hassani, Mehdi
core  

Riemann-Hilbert problem for the Moisil-Teodorescu system in multiple connected domains

open access: yesElectronic Journal of Differential Equations, 2016
In this article we obtain a new integral representation of the general solution of the Moisil-Teodorescu system in a multiply connected domain. Also we give applications of this representation to Riemann-Hilbert problem.
Viktor A. Polunin, Alexandre P. Soldatov
doaj  

A Riemann–Hilbert approach to the Heun equation [PDF]

open access: yes, 2018
We describe the close connection between the linear system for the sixth Painlevé equation and the general Heun equation, formulate the Riemann–Hilbert problem for the Heun functions and show how, in the case of reducible monodromy, the Riemann–Hilbert ...
Dubrovin, B.   +3 more
core   +1 more source

Vector inequalities for powers of some operators in Hilbert spaces

open access: yes, 2008
Vector inequalities for powers of some operators in Hilbert spaces with applications for operator norm, numerical radius, commutators and self-commutators are ...
Dragomir, Sever S, S.S. Dragomir
core   +1 more source

Matrix Jacobi biorthogonal polynomials via Riemann–Hilbert problem

open access: yes, 2023
We consider matrix orthogonal polynomials related to Jacobi type matrices of weights that can be defined in terms of a given matrix Pearson equation. Stating a Riemann–Hilbert problem we can derive first and second order differential-difference relations
Mañas, Manuel   +7 more
core   +1 more source

Bäcklund-Darboux Transformation for Non-Isospectral Canonical System and Riemann-Hilbert Problem

open access: yesSymmetry, Integrability and Geometry: Methods and Applications, 2007
A GBDT version of the Bäcklund-Darboux transformation is constructed for a non-isospectral canonical system, which plays essential role in the theory of random matrix models. The corresponding Riemann-Hilbert problem is treated and some explicit formulas
Alexander Sakhnovich
doaj  

General Riemann-Hilbert problem with discontinuous coefficients for Moisil-Theodoresco system with junior members

open access: yesLietuvos Matematikos Rinkinys, 1997
For Moisil–Theodoresco system with junior members a problem of new type, called Riemann­–Hilbert problem with discontinuous coefficients, is considered. Under certain conditions this prob­lem is proved to have Fredholm property for the mentioned system.
Rima Matiukaitė
doaj   +1 more source

A Riemann-Hilbert problem from stability conditions

open access: yes, 2019
Given an algebra $A$ and a set of automorphisms, one can define a Riemann-Hilbert (RH) problem, aimed to find meromorphic connections on the $\mathrm{Aut}(A)$-principl bundle over $\bC$ with prescribed generalised monodromy.
Barbieri, Anna
core  

Matrix Riemann–Hilbert problems and factorization on Riemann surfaces

open access: yes, 2008
The Wiener–Hopf factorization of 2×2 matrix functions and its close relation to scalar Riemann–Hilbert problems on Riemann surfaces is investigated. A family of function classes denoted C(Q1,Q2) is defined.
Pedro F. dos Santos   +5 more
core   +1 more source

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