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In this note, we study both the Riesz and reverse Riesz transforms on broken line. This model can be described by $(-\infty, -1] \cup [1,\infty)$ equipped with the measure $d\mu = |r|^{d_{1}-1}dr$ for $r \le -1$ and $d\mu = r^{d_{2}-1}dr$…

Classical Analysis and ODEs · Mathematics 2025-03-20 Dangyang He

In this work, we are interested in the controllability of Vlasov-Poisson systems in the presence of an external force field (namely a bounded force field or a magnetic field), by means of a local interior control. We are able to extend the…

Analysis of PDEs · Mathematics 2012-06-08 Olivier Glass , Daniel Han-Kwan

We consider maps into Riemannian manifolds of non-positive curvature and start developing a systematic PDE theory. We control the Sobolev $H^{2,2}$-norm of such a map in terms of its energy, the $L^2$-norm of its tension field and a…

Differential Geometry · Mathematics 2007-05-23 Wenyi Chen , Juergen Jost

We study the eigenvalues of the Dirichlet Laplace operator on an arbitrary bounded, open set in $\R^d$, $d \geq 2$. In particular, we derive upper bounds on Riesz means of order $\sigma \geq 3/2$, that improve the sharp Berezin inequality…

Spectral Theory · Mathematics 2012-02-29 Leander Geisinger , Ari Laptev , Timo Weidl

We obtain inequalities for the Riesz means for the discrete spectrum of a class of self-adjoint compact integral operators. Such bounds imply some inequalities for the counting function of the Dirichlet boundary problem for the Laplace…

Analysis of PDEs · Mathematics 2019-06-21 Ari Laptev , Andrei Velicu

We prove the existence of weak solutions in the space of energy for a class of non-linear Schroedinger equations in the presence of a external rough magnetic potential. Under our assumptions it is not possible to study the problem by means…

Analysis of PDEs · Mathematics 2018-04-18 Paolo Antonelli , Alessandro Michelangeli , Raffaele Scandone

In the present paper, we consider the following singularly perturbed problem: \begin{equation*} \left\{ \begin{array}{ll} -\varepsilon^2\triangle u+V(x)u=\varepsilon^{-\alpha}(I_{\alpha}*F(u))f(u), & x\in \R^N; u\in H^1(\R^N), \end{array}…

Analysis of PDEs · Mathematics 2019-03-26 Xianhua Tang , Sitong Chen

Using the standard Bardeen-Cooper-Schrieffer (BCS) theory, we revise microscopic derivation of the superconductor-insulator boundary conditions for the Ginzburg-Landau (GL) model. We obtain a negative contribution to free energy in the form…

Superconductivity · Physics 2021-06-11 Albert Samoilenka , Egor Babaev

In this work we study three exterior extension problems for strongly elliptic partial equations: the Cauchy problem (in a special statement), the "analytical" continuation problem and the so called "inner" Dirichlet problem in the scale of…

Analysis of PDEs · Mathematics 2022-09-23 Vitaly Kalinin , Alexander Shlapunov

For the Riesz kernel $\kappa_\alpha(x,y):=|x-y|^{\alpha-n}$ on $\mathbb R^n$, where $n\geqslant2$, $\alpha\in(0,2]$, and $\alpha<n$, we consider the problem of minimizing the Gauss functional…

Classical Analysis and ODEs · Mathematics 2023-12-01 Natalia Zorii

As it was shown by Shen, the Riesz transforms associated to the Schr\"odinger operator $L=-\Delta + V$ are not bounded on $L^p(\mathbb{R}^d)$-spaces for all $p, 1<p<\infty$, under the only assumption that the potential satisfies a reverse…

Analysis of PDEs · Mathematics 2020-08-27 Bruno Bongioanni , Eleonor Harboure , Pablo Quijano

We introduce the notion of unbounded locally solid Riesz spaces, and investigate its fundamental properties.

Functional Analysis · Mathematics 2017-08-18 Zafer Ercan , Mehmet Vural

Quasiclassical equations with manifest gauge invariance are discussed in the context of unconventional singlet superconducting states in the static limit. Deviations of the quasiclassical propagator from its equilibrium solutions in the…

Superconductivity · Physics 2020-08-03 Priya Sharma

In this paper, we study the Cauchy problem for the energy-critical inhomogeneous nonlinear Schr\"{o}dinger equation with inverse-square potential \[iu_{t} +\Delta u-c|x|^{-2}u=\lambda|x|^{-b} |u|^{\sigma } u,\; u(0)=u_{0} \in…

Analysis of PDEs · Mathematics 2021-09-21 RoeSong Jang , JinMyong An , JinMyong Kim

This paper develops a general method to construct Ehrenfest-like relations for Lagrangian field theories when an external, coordinate-dependent scalar potential is applied. To do so, we derive continuity equations in which the spatial and…

Quantum Physics · Physics 2023-12-05 Rayn Samson

We study the Dirichlet boundary value problem for equations with absorption of the form $-\Delta u+g\circ u=\mu$ in a bounded domain $\Omega\subset R^N$ where $g$ is a continuous odd monotone increasing function. Under some additional…

Classical Analysis and ODEs · Mathematics 2011-03-01 Moshe Marcus

We consider the energy-critical stochastic cubic nonlinear Schr\"odinger equation on $\mathbb R^4$ with additive noise, and with the non-vanishing boundary conditions at spatial infinity. By viewing this equation as a perturbation to the…

Analysis of PDEs · Mathematics 2024-07-26 Kelvin Cheung , Guopeng Li

In this study, we investigate the optimal control of the Landau-Lifshitz-Bloch equation within confined domains in $\mathbb R^n$ for $n= 2, 3.$ We establish the existence of strong solutions for dimensions $n=1, 2, 3$ under suitable growth…

Optimization and Control · Mathematics 2025-03-13 Sidhartha Patnaik , Kumarasamy Sakthivel

We prove functional inequalities in any dimension controlling the iterated derivatives along a transport of the Coulomb or super-Coulomb Riesz modulated energy in terms of the modulated energy itself. This modulated energy was introduced by…

Analysis of PDEs · Mathematics 2025-10-29 Matthew Rosenzweig , Sylvia Serfaty

In this paper we prove the boundedness of the Gaussian Riesz potentials $I_{\beta}$, for $\beta\geq 1$ on $L^{p(\cdot)}(\gamma_d)$, the Gaussian variable Lebesgue spaces under a certain additional condition of regularity on $p(\cdot)$…

Classical Analysis and ODEs · Mathematics 2022-08-26 Eduard Navas , Ebner Pineda , Wilfredo O. Urbina