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The work deals with the existence of solutions of a certain system of quadratic integral equations in H^2(R^d,R^N), d = 2, 3. We demonstrate the existence of a perturbed solution by virtue of a fixed point technique.

Analysis of PDEs · Mathematics 2025-06-19 Vitali Vougalter

This is a short historical note concerning the evolution of Wetzel's problem and Erdos' solution.

History and Overview · Mathematics 2014-10-24 Stephan Ramon Garcia , Amy L. Shoemaker

This paper investigates the nonlinear Schr\"{o}dinger equation with a singular convolution potential. It demonstrates the local well-posedness of this equation in a modified Sobolev space linked to the energy. Additionally, we derive…

Analysis of PDEs · Mathematics 2024-04-05 Amin Esfahani , Achenef Tesfahun

A solution of Problem 184 from the Scottish Book is presented.

Complex Variables · Mathematics 2020-03-31 Alexandre Eremenko

This article presents an equivalent formulation of the implicit complementarity problem. We demonstrate that solution of the equivalent formulation is equivalent to the solution of the implicit complementarity problem. Moreover, we provide…

Optimization and Control · Mathematics 2023-12-08 Bharat Kumar , Deepmala , A. K. Das

We study uniqueness properties of solutions of Schr\"odinger equations. The aim is to obtain sufficient conditions on the decay behavior of the difference of two solution $u_1-u_2$ of the equation at two different times $t_0=0$ and $t_1=1$…

Analysis of PDEs · Mathematics 2016-09-07 L. Escauriaza , C. E. Kenig , G. Ponce , L. Vega

An approach is proposed for bounding the number of zeros that solutions of linear differential systems with polynomial coefficients may have. A bound is obtained in a special case which improves upon currently existing.

Dynamical Systems · Mathematics 2007-05-23 Alexei Grigoriev

This paper focuses on the existence of multiple normalized solutions to Schr\"{o}dinger equations with general nonlinearities in bounded domains via variational methods. We first obtain two positive normalized solutions, one is a normalized…

Analysis of PDEs · Mathematics 2025-06-19 Wei Ji

Here we give a short survey of our new results. References to the complete proofs can be found in the text of this article and in the litterature.

Combinatorics · Mathematics 2009-10-16 Vitaliy Koshelev

In this paper we provide theoretical results that relate steady states of continuous and discrete models arising from biology.

Classical Analysis and ODEs · Mathematics 2011-09-27 Alan Veliz-Cuba , Joseph Arthur , Laura Hochstetler , Victoria Klomps , Erikka Korpi

In this paper we study the existence of solutions to an isotropic differential inclusion.

Analysis of PDEs · Mathematics 2011-04-01 Ana Cristina Barroso , Gisella Croce , Ana Ribeiro

In this paper we give stochastic solutions of conformable fractional Cauchy problems. The stochastic solutions are obtained by running the processes corresponding to Cauchy problems with a nonlinear deterministic clock.

Probability · Mathematics 2016-06-23 Yucel Cenesiz , Ali Kurt , Erkan Nane

A novel approach to an old symmetry problem is developed. A new proof is given for the following symmetry problem, studied earlier.

Mathematical Physics · Physics 2014-02-14 Alexander G. Ramm

We consider the Dirichlet problem for two types of degenerate elliptic Hessian equations . New results about solvability of the equations in the $C^{1,1}$ space are provided.

Analysis of PDEs · Mathematics 2007-05-23 Hongjie Dong

A special case of the satisfiability problem, in which the clauses have a hierarchical structure, is shown to be solvable in linear time, assuming that the clauses have been represented in a convenient way.

Computational Complexity · Computer Science 2008-02-03 Donald E. Knuth

We prove an abstract linking theorem that can be used to show existence of solutions to various types of variational elliptic equations, including Schr\"{o}dinger--Poisson--Slater type equations.

Analysis of PDEs · Mathematics 2025-06-03 Kanishka Perera , Kaye Silva

In this work, we state a general conjecture on the solvability of optimization problems via algorithms with linear convergence guarantees. We make a first step towards examining its correctness by fully characterizing the problems that are…

Optimization and Control · Mathematics 2024-06-27 Foivos Alimisis

In this paper we analyze the existence of entire radially symmetric solutions for Schrodinger system type {\Delta}_{p_{i}}u_{i}+h_{i}(r)|\nabla u_{i}|^{p_{i}-1}=a_{i}(r)f_{i}(u_1,...,u_{d}) for i=1,...,d on R^{N} where p_{i}>1, d \in…

Classical Analysis and ODEs · Mathematics 2011-05-17 Dragos-Patru Covei

In this paper, we almost completely solve the existence of an almost resolvable cycle system with odd cycle length. We also use almost resolvable cycle systems as well as other combinatorial structures to give some new solutions to the…

Combinatorics · Mathematics 2017-10-10 L. Wang , S. Lu , H. Cao

A method is presented to construct exactly solvable nonlinear extensions of the Schr\"odinger equation. The method explores a correspondence which can be established under certain conditions between exactly solvable ordinary Schr\"odinger…

Quantum Physics · Physics 2023-04-04 Tom Dodge , Peter Schweitzer