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A system of singular integral equations with monotone and concave nonlinearity in the subcritical case is investigated. The specified system and its scalar analog have direct applications in various areas of physics and biology. In…

泛函分析 · 数学 2024-10-28 A. Kh. Khachatryan , Kh. A. Khachatryan , H. S. Petrosyan

Null vectors are generalized to the case of indecomposable representations which are one of the main features of logarithmic conformal field theories. This is done by developing a compact formalism with the particular advantage that the…

高能物理 - 理论 · 物理学 2009-10-30 Michael Flohr

We prove a uniform vector-valued Wiener-Wintner Theorem for a class of operators that includes compositions of ergodic Koopman operators with contractive multiplication operators. Our results are new even in the case of complex-valued…

泛函分析 · 数学 2025-03-20 Micky Barthmann , Sohail Farhangi

While there is a well developed theory of locally solid topologies, many important convergences in vector lattice theory are not topological. Yet they share many properties with locally solid topologies. Building upon the theory of…

泛函分析 · 数学 2024-04-25 E. Bilokopytov , J. Conradie , V. G. Troitsky , J. H. van der Walt

We prove well-posedness and regularity results for elliptic boundary value problems on certain domains with a smooth set of singular points. Our class of domains contains the class of domains with isolated oscillating conical singularities,…

偏微分方程分析 · 数学 2019-04-15 Bernd Ammann , Nadine Grosse , Victor Nistor

We prove Cuntz-Krieger and graded uniqueness theorems for Steinberg algebras. We also show that a Steinberg algebra is basically simple if and only if its associated groupoid is both effective and minimal. Finally we use results of…

环与代数 · 数学 2014-03-20 Lisa Orloff Clark , Cain Edie-Michell

An inverse problem of finding an obstacle and the boundary condition on its surface from the fixed-energy scattering data is studied. A new method is developed for a proof of the uniqueness results. The method does not use the discreteness…

数学物理 · 物理学 2007-05-23 A. G. Ramm

In this paper we prove some new fixed point theorems for multivalued mappings on orbitally complete uniform spaces.

一般拓扑 · 数学 2007-05-23 Duran Turkoglu , Brian Fisher

We prove the two theorems of the title, settling two long standing questions in the local theory of singular minimal hypersurfaces. The sharpness of either result is with respect to its hypothesis on the size of the allowable singular sets.…

微分几何 · 数学 2013-10-16 Neshan Wickramasekera

We prove existence and uniqueness of strong solutions to a large class of autonomous stochastic differential equations on an open domain, where the drift exhibits a singular behaviour at the boundary. The main result involves a drift…

概率论 · 数学 2025-08-06 Daniela Morale , Giulia Rui , Stefania Ugolini

We establish bounds on a finite separable extension of function fields in terms of the relative class number, thus reducing the problem of classifying extensions with a fixed relative class number to a finite computation. We also solve the…

Well-founded fixed points have been used in several areas of knowledge representation and reasoning and to give semantics to logic programs involving negation. They are an important ingredient of approximation fixed point theory. We study…

离散数学 · 计算机科学 2015-12-02 Arnaud Carayol , Zoltan Esik

The unicity of real Picard-Vessiot fields for differential modules over a real differential field is proved.

交换代数 · 数学 2013-02-06 Teresa Crespo , Zbigniew Hajto , Marius van der Put

In this short note, we prove the uniqueness of exterior differentiation on locally finite graphs.

经典分析与常微分方程 · 数学 2020-01-28 Yongjie Shi , Chengjie Yu

For the two dimensional Euler equations, a classical result by Yudovich states that solutions are unique in the class of bounded vorticity; it is a celebrated open problem whether this uniqueness result can be extended in other…

偏微分方程分析 · 数学 2021-08-24 Elia Brué , Maria Colombo

In this short note we prove, by means of classical fixed point index, an affine version of a Birkhoff--Kellogg type theorem in cones. We apply our result to discuss the solvability of a class of boundary value problems for functional…

经典分析与常微分方程 · 数学 2022-11-03 Alessandro Calamai , Gennaro Infante

In this article, we study a boundary value problem of a class of singular linear discrete time systems whose coefficients are non-square constant matrices or square with a matrix pencil which has an identically zero determinant. By taking…

最优化与控制 · 数学 2015-11-27 Ioannis K. Dassios

A Strong Convergence Theorem for finite families of Bregman Demimetric Mappings in a Banach Space under a New Shrinking projection Method

泛函分析 · 数学 2021-09-07 Bijan Orouji , Ebrahim Soori , Donal O'Regan , Ravi P. Agarwal

For isolated complex hypersurface singularities with real defining equation we show the existence of a monodromy vector field such that complex conjugation intertwines the local monodromy diffeomorphism with its inverse. In particular, it…

代数几何 · 数学 2007-05-23 Norbert A'Campo

Linear differential equations and recurrences reveal many properties about their solutions. Therefore, these equations are well-suited for representing solutions and computing with special functions. We identify a large class of existing…

符号计算 · 计算机科学 2026-01-14 Louis Gaillard