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We present in this paper a \boundary version" for theorems about minimality of volume and energy functionals on a spherical domain of threedimensional Euclidean sphere.

Differential Geometry · Mathematics 2011-01-28 Fabiano G. B. Brito , André Gomes , Giovanni S. Nunes

New lower bounds for the binding energy of a quantum-mechanical system of interacting particles are presented. The new bounds are expressed in terms of two-particle quantities and improve the conventional bounds of the Hall-Post type. They…

Nuclear Theory · Physics 2009-11-07 D. Van Neck , Y. Dewulf , M. Waroquier

We prove a result on lower bounds in large dimensions.

Analysis of PDEs · Mathematics 2013-01-04 Bernard Lascar

The problem of bounding of the distance between the two bodies of volume $\varepsilon$ located inside the $n$-dimensional body $B$ of unit volume where $n \to \infty$ is considered. In some cases such distances are bounded by function…

Metric Geometry · Mathematics 2014-12-24 Fyodor Ivlev

We prove that the sumset or the productset of any finite set of real numbers, $A,$ is at least $|A|^{4/3-\epsilon},$ improving earlier bounds. Our main tool is a new upper bound on the multiplicative energy, $E(A,A).$

Combinatorics · Mathematics 2008-06-23 Jozsef Solymosi

We show that affine coordinate subspaces of dimension at least two in Euclidean space are of Khintchine type for divergence. For affine coordinate subspaces of dimension one, we prove a result which depends on the dual Diophantine type of…

Number Theory · Mathematics 2017-08-09 Felipe A. Ramírez , David S. Simmons , Fabian Süess

While there is extensive literature on approximation of convex bodies by inscribed or circumscribed polytopes, much less is known in the case of generally positioned polytopes. Here we give upper and lower bounds for approximation of convex…

Probability · Mathematics 2021-03-03 Steven D. Hoehner , Carsten Schuett , Elisabeth M. Werner

We give bounds on geodesic distances on the Stiefel manifold, derived from new geometric insights. The considered geodesic distances are induced by the one-parameter family of Riemannian metrics introduced by H\"uper et al. (2021), which…

Differential Geometry · Mathematics 2024-08-15 Simon Mataigne , P. -A. Absil , Nina Miolane

The "Perpendicular Bisectors Construction" is a natural way to seek a replacement for the circumcenter of a noncyclic quadrilateral in the plane. In this paper, we generalize this iterative construction to a construction on polytopes with…

Metric Geometry · Mathematics 2012-03-30 Emmanuel Tsukerman

In this note, we consider two types of estimates for the Harnack distance in bounded domains of a finite-dimensional Euclidean space. The first type is based on the geometric concept of the entropy of arcwise connectedness. We used this…

Complex Variables · Mathematics 2021-10-01 B. N. Khabibullin

We bound the number of nearly orthogonal vectors with fixed VC-dimension over $\setpm^n$. Our bounds are of interest in machine learning and empirical process theory and improve previous bounds by Haussler. The bounds are based on a simple…

Combinatorics · Mathematics 2011-02-18 Lee-Ad Gottlieb , Leonid , Kontorovich , Elchanan Mossel

An upper bound on degrees of elements of a minimal generating system for invariants of quivers of dimension (2,...,2) is established over a field of arbitrary characteristic and its precision is estimated. The proof is based on the…

Combinatorics · Mathematics 2012-04-26 A. A. Lopatin

We obtain upper and lower bounds for Steklov eigenvalues of submanifolds with prescribed boundary in Euclidean space. A very general upper bound is proved, which depends only on the geometry of the fixed boundary and on the measure of the…

Spectral Theory · Mathematics 2018-01-22 Bruno Colbois , Alexandre Girouard , Katie Gittins

We consider the variational problem of minimizing an anisotropic perimeter functional under a volume constraint in a Euclidean convex domain. We extend to this setting analytical properties of the isoperimetric profile, topological features…

Differential Geometry · Mathematics 2025-04-14 César Rosales

We derive a new bound for some bilinear sums over points of an elliptic curve over a finite field. We use this bound to improve a series of previous results on various exponential sums and some arithmetic problems involving points on…

Number Theory · Mathematics 2013-08-23 Omran Ahmadi , Igor E. Shparlinski

We give an explicit upper bound for the number of equivalence classes of binary forms with rational integral coefficients of given degree and given discriminant, and with given splitting field. Further, we give an explicit upper bound for…

Number Theory · Mathematics 2015-06-26 Attila Berczes , Jan-Hendrik Evertse , Kalman Gyory

We study the scaling limit and prove the law of large numbers for weakly pinned Gaussian random fields under the critical situation that two possible candidates of the limits exist at the level of large deviation principle. This paper…

Probability · Mathematics 2014-07-01 Erwin Bolthausen , Taizo Chiyonobu , Tadahisa Funaki

This paper considers overdetermined boundary problems. Firstly, we give a proof to the Payne-Schaefer conjecture about an overdetermined problem of sixth order in the two dimensional case and under an additional condition for the case of…

Analysis of PDEs · Mathematics 2021-10-06 Changyu Xia

We give a new asymptotic upper bound on the size of a code in the Grassmannian space. The bound is better than the upper bounds known previously in the entire range of distances except very large values.

Information Theory · Computer Science 2019-05-14 Alexander Barg , Dmitry Nogin

In this paper, we use a weighted isoperimetric inequality to give a lower bound on the first Dirichlet eigenvalue of the Laplacian on a bounded domain inside a Euclidean cone. Our bound is sharp, in that only sectors realize it. This result…

Analysis of PDEs · Mathematics 2016-02-02 Jesse Ratzkin