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This paper concerns a solution of the smoothing problem in Chow-Rashevskii's connectivity theorem.

Differential Geometry · Mathematics 2022-08-09 Waldyr M. Oliva , Glaucio Terra

In this paper, we will continue the investigation of Waring's problem, and give further improvements.

Combinatorics · Mathematics 2025-01-15 An-Ping Li

The aim of this paper is to find the exact solutions of the Schrodinger equation. As is known, the Schrodinger equation can be reduced to the continuum equation. In this paper, using the non-linear Legendre transform the equation of…

Quantum Physics · Physics 2018-10-17 E. E. Perepelkin , B. I. Sadovnikov , N. G. Inozemtseva , A. A. Tarelkin

We relate the graph isomorphism problem to the solvability of certain systems of linear equations with nonnegative variables. This version replaces the two previous versions of this paper.

Computational Complexity · Computer Science 2008-01-10 Shmuel Friedland

We characterize those compact sets for which the Dirichlet problem has a solution within the class of continuous $m$-subharmonic functions defined on a compact set, and then within the class of $m$-harmonic functions.

Complex Variables · Mathematics 2018-12-18 Per Ahag , Rafal Czyz , Lisa Hed

Some solutions of the Heavenly equations and their generalizations are considered

General Relativity and Quantum Cosmology · Physics 2007-05-23 Valerii Dryuma

We are concerned with the Dirichlet problem for a class of Hessian type equations. Applying some new methods we are able to establish the $C^2$ estimates for an approximating problem under essentially optimal structure conditions. Based on…

Analysis of PDEs · Mathematics 2016-05-06 Heming Jiao , Tingting Wang

Recently we have reanalyzed the consistency of the solutions of the space fractional Schr\"odinger equation found in a piecewise manner, and showed that an exact and a proper treatment of the relevant integrals prove that they are…

Mathematical Physics · Physics 2012-08-16 Selçuk Ş. Bayin

We obtain sufficient conditions for the uniqueness of solutions to the Cauchy problem for the continuity equation in classes of measures that need not be absolutely continuous.

Analysis of PDEs · Mathematics 2018-06-18 V. I. Bogachev , G. Da Prato , M. Röckner , S. V. Shaposhnikov

Continuous branches of similarity solutions of the fourth-order stable thin film equation are studied.

Analysis of PDEs · Mathematics 2010-03-08 J. D. Evans , V. A. Galaktionov

We study a specific convex maximization problem in the space of continuous functions defined on a semi-infinite interval. An unexplained connection to the discrete version of this problem is investigated.

Optimization and Control · Mathematics 2007-05-23 Steven Finch

We find a formula for the number of solutions of linear congruence systems, by using elementary methods.

Number Theory · Mathematics 2021-02-15 Marcus Nilsson , Robert Nyqvist

We discuss a new approach to solve the low lying states of the Schroedinger equation. For a fairly large class of problems, this new approach leads to convergent iterative solutions, in contrast to perturbative series expansions. These…

Quantum Physics · Physics 2009-11-10 R. Friedberg , T. D. Lee

This paper is devoted to Riemann-Hilbert problems with constraints. We obtain results characterizing the existence of solutions as well as the dimension of the solution space in terms of certain indices. As an application, we show how such…

Complex Variables · Mathematics 2018-08-22 Florian Bertrand , Giuseppe Della Sala

We generalize some classical results for the Schlesinger system of partial differential equations and give the explicit form of its solution, associated with rational matrix functions in general position.

Classical Analysis and ODEs · Mathematics 2007-05-23 Dan Volok

We generalize the harmonic continuation of the Riemann xi-function to the $n$-dimension case, to obtain the solution to the Dirichlet problem on $\mathbb{R}_{+}^{n+1}.$ We also provide a new expansion for the harmonic continuation of the…

Classical Analysis and ODEs · Mathematics 2025-03-11 Alexander E. Patkowski

We study a boundary-value quasilinear elliptic problem on a generic time scale. Making use of the fixed-point index theory, sufficient conditions are given to obtain existence, multiplicity, and infinite solvability of positive solutions.

Analysis of PDEs · Mathematics 2007-10-08 Moulay Rchid Sidi Ammi , Delfim F. M. Torres

In this paper, we study the global existence and regularity of H\"older continuous solutions for a series of nonlinear partial differential equations describing nonlinear waves.

Analysis of PDEs · Mathematics 2014-09-17 Geng Chen , Yannan Shen

Author of this article created for the first time the method for finding solutions of the Minkowski problem for closed surfaces in Riemannian space.

Differential Geometry · Mathematics 2007-09-04 Andrei I. Bodrenko

We show the existence of periodic solutions for continuous symmetric perturbations of certain planar power law problems.

Classical Analysis and ODEs · Mathematics 2007-05-23 C. Azevedo , P. Ontaneda