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Utilizing frameworks developed by Delsarte, Yudin and Levenshtein, we deduce linear programming lower bounds (as $N\to \infty$) for the Riesz energy of $N$-point configurations on the $d$-dimensional unit sphere in the so-called…

Mathematical Physics · Physics 2019-02-20 Douglas P. Hardin , Timothy J. Michaels , Edward B. Saff

We study the minimization of a spectral functional made as the sum of the first eigenvalue of the Dirichlet Laplacian and the relative strength of a Riesz-type interaction functional. We show that when the Riesz repulsion strength is below…

Analysis of PDEs · Mathematics 2021-03-09 Dario Mazzoleni , Berardo Ruffini

Given a compact $d$-rectifiable set $A$ embedded in Euclidean space and a distribution $\rho(x)$ with respect to $d$-dimensional Hausdorff measure on $A$, we address the following question: how can one generate optimal configurations of $N$…

Mathematical Physics · Physics 2007-05-23 S. V. Borodachov , D. P. Hardin , E. B. Saff

The asymptotic form of the energy density for a gas of particles surrounding a sphere of mass $M$ and radius $R$ is studied using Einstein's equations. It is shown that if the pressure of the gas $p$ varies linearly with the energy density…

High Energy Physics - Phenomenology · Physics 2007-05-23 Achilles D. Speliotopoulos

Let $\Lambda$ be a lattice in ${\bf R}^d$ with positive co-volume. Among $\Lambda$-periodic $N$-point configurations, we consider the minimal renormalized Riesz $s$-energy $\mathcal{E}_{s,\Lambda}(N)$. While the dominant term in the…

Mathematical Physics · Physics 2015-11-06 Douglas P. Hardin , Edward B. Saff , Brian Z. Simanek , Yujian Su

We study the d-dimensional random Ising model using a Bethe-Peierls approximation in the framework of the replica method. We take into account the correct interaction only inside replicated clusters of spins. Our ansatz is that the…

Condensed Matter · Physics 2009-10-28 M. Serva , G. Paladin

We obtain new asymptotic results about systems of $ N $ particles governed by Riesz interactions involving $ k $-nearest neighbors of each particle as $N\to\infty$. These results include a generalization to weighted Riesz potentials with…

Classical Analysis and ODEs · Mathematics 2023-03-21 Douglas P. Hardin , Edward B. Saff , Oleksandr Vlasiuk

The study deals with a minimal energy problem in the presence of an external field over noncompact classes of vector measures of infinite dimension in a locally compact space. The components are positive measures (charges) satisfying…

Classical Analysis and ODEs · Mathematics 2009-11-05 Natalia Zorii

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

We consider the minimization of an energy functional given by the sum of a density perimeter and a nonlocal interaction of Riesz type with exponent $\alpha$, under volume constraint, where the strength of the nonlocal interaction is…

Analysis of PDEs · Mathematics 2020-10-16 Stan Alama , Lia Bronsard , Ihsan Topaloglu , Andres Zuniga

We show that balls, circles and 2-spheres can be identified by generalized Riesz energy among compact submanifolds of the Euclidean space that are either closed or with codimension 0, where the Riesz energy is defined as the double integral…

Differential Geometry · Mathematics 2021-02-08 Jun O'Hara

In this short note, we employ well-known results to improve the lower bound for the constant associated with the linear term in the asymptotic expansion of the minimal logarithmic energy on the sphere.

Classical Analysis and ODEs · Mathematics 2025-06-03 Jordi Marzo

We study the Schr\"odinger-Poisson system on the unit sphere $\SS^2$ of $\RR^3$, modeling the quantum transport of charged particles confined on a sphere by an external potential. Our first results concern the Cauchy problem for this…

Analysis of PDEs · Mathematics 2010-11-05 Patrick Gérard , Florian Méhats

Observations suggest that configurations of points on a sphere that are stable with respect to a Riesz potential distribute points uniformly over the sphere. Further, these stable configurations have a local structure that is largely…

Mathematical Physics · Physics 2015-06-16 M. Calef , W. Griffiths , A. Schulz , C. Fichtl , D. Hardin

We study the boundedness on $L^p$ of the Riesz transform $\nabla L^{-1/2}$, where $L$ is one of several operators defined on $\R$ or $\R_+$, endowed with the measure $r^{d-1} dr$, $d > 1$, where $dr$ is Lebesgue measure. For integer $d$,…

Analysis of PDEs · Mathematics 2007-12-14 Andrew Hassell , Adam Sikora

We derive four reduced two-dimensional models that describe, at different spatial scales, the micromagnetics of ultrathin ferromagnetic materials of finite spatial extent featuring perpendicular magnetic anisotropy and interfacial…

Analysis of PDEs · Mathematics 2024-09-12 G. Di Fratta , C. B. Muratov , V. V. Slastikov

We study a capacity theory based on a definition of a Riesz potential in metric spaces with a doubling measure. In this general setting, we study the basic properties of the Riesz capacity, including monotonicity, countable subadditivity…

Functional Analysis · Mathematics 2015-10-30 Juho Nuutinen , Pilar Silvestre

We prove that the energy conditions in arXiv:1302.5093v7 are implied by the fractional A2 conditions and testing conditions for the vector of fractional Riesz transforms when one measure is supported on a line. Then we apply the main…

Classical Analysis and ODEs · Mathematics 2014-03-18 Eric T. Sawyer , Chun-Yen Shen , Ignacio Uriarte-Tuero

We consider Riesz-type nonlocal interaction energies over polygons. We prove the analog of the Riesz inequality in this discrete setting for triangles and quadrilaterals, and obtain that among all $N$-gons with fixed area, the nonlocal…

Analysis of PDEs · Mathematics 2021-12-13 Marco Bonacini , Riccardo Cristoferi , Ihsan Topaloglu

We study the restricted motion of an electric charge in a spherical surface in the field of a magnetic dipole. This is the classical non-relativistic St\"oermer problem within a sphere, with the dipole in its centre. We start from a…

Classical Physics · Physics 2013-01-14 Emilio Cortés , D Cortés-Poza