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We prove a general inequality for mixed Hessian measures by global arguments. Our method also yields a simplification for the case of complex Monge-Amp\`ere equation. Exploiting this and using Ko{\l}odziej's mass concentration technique we…

复变函数 · 数学 2014-04-25 Sławomir Dinew , Chinh H. Lu

The existence of self-similar solutions with fat tails for Smoluchowski's coagulation equation has so far only been established for the solvable and the diagonal kernel. In this paper we prove the existence of such self-similar solutions…

偏微分方程分析 · 数学 2015-06-03 Barbara Niethammer , Juan J. L. Velazquez

Minkowski's classical existence theorem provides necessary and sufficient conditions for a Borel measure on the unit sphere of Euclidean space to be the surface area measure of a convex body. The solution is unique up to a translation. We…

度量几何 · 数学 2020-08-18 Rolf Schneider

We report a number of exact solutions for temperature-dependent Smoluchowski equations. These equations quantify the ballistic agglomeration, where the evolution of densities of agglomerates of different size is entangled with the evolution…

统计力学 · 物理学 2022-11-09 Alexander Osinsky , Nikolay Brilliantov

We describe a basic framework for studying dynamic scaling that has roots in dynamical systems and probability theory. Within this framework, we study Smoluchowski's coagulation equation for the three simplest rate kernels $K(x,y)=2$, $x+y$…

适应与自组织系统 · 物理学 2013-05-16 Govind Menon , Robert L. Pego

We show that the only even, smooth, convex solutions to a class of isotropic mixed Christoffel-Minkowski type problems are origin-centred spheres, which, in particular, answers a question of Firey 74 in the even isotropic case about…

微分几何 · 数学 2023-07-17 Mohammad N. Ivaki

In this article we solve the complex Monge-Ampere equation for measures with large singular part. This result generalizes classical results by Demailly, Lelong and Lempert a.o., who considered singular parts carried on discrete sets. By…

复变函数 · 数学 2008-08-19 Per Ahag , Urban Cegrell , Rafal Czyz , Pham Hoang Hiep

We are interested in the uniqueness of solutions to Maxwell's equations when the magnetic permeability $\mu$ and the permittivity $\varepsilon$ are symmetric positive definite matrix-valued functions in $\mathbb{R}^{3}$. We show that a…

偏微分方程分析 · 数学 2012-12-07 John M. Ball , Yves Capdeboscq , Basang Tsering Xiao

The variation of a class of Orlicz moments with respect to the Asplund sum within the class of log-concave functions is demonstrated. Such a variational formula naturally leads to a family of dual Orlicz curvature measures for log-concave…

度量几何 · 数学 2023-09-22 Niufa Fang , Deping Ye , Zengle Zhang , Yiming Zhao

We prove the existence and uniqueness of weak solutions to a class of anisotropic elliptic equations with coefficients of convection term belonging to some suitable Marcinkiewicz spaces. Some useful a priori estimates and regularity results…

偏微分方程分析 · 数学 2023-07-27 Giuseppina di Blasio , Filomena Feo , Gabriella Zecca

We develop a new method to uniquely solve a large class of heat equations, so-called Kolmogorov equations in infinitely many variables. The equations are analyzed in spaces of sequentially weakly continuous functions weighted by proper…

概率论 · 数学 2016-08-16 Michael Röckner , Zeev Sobol

In this paper we study the continuous coagulation and multiple fragmentation equation for the mean-field description of a system of particles taking into account the combined effect of the coagulation and the fragmentation processes in…

偏微分方程分析 · 数学 2018-11-16 Prasanta Kumar Barik

We consider the approach to self-similarity (or dynamical scaling) in Smoluchowski's equations of coagulation for the solvable kernels $K(x,y)=2$, $x+y$ and $xy$. In addition to the known self-similar solutions with exponential tails, there…

适应与自组织系统 · 物理学 2007-05-23 Govind Menon , Robert L. Pego

Measurement incompatibility is one of the basic aspects of quantum theory. Here we study the structure of the set of compatible -- i.e. jointly measurable -- measurements. We are interested in whether or not there exist compatible…

量子物理 · 物理学 2020-07-01 Paul Skrzypczyk , Matty J. Hoban , Ana Belén Sainz , Noah Linden

We study the high frequency limit for the dissipative Helmholtz equation when the source term concentrates on a submanifold of R^n. We prove that the solution has a unique semi-classical measure, which is precisely described in terms of the…

数学物理 · 物理学 2013-02-05 Julien Royer

We study self-similar measures in $\mathbb{R}$ satisfying the weak separation condition along with weak technical assumptions which are satisfied in all known examples. For such a measure $\mu$, we show that there is a finite set of concave…

动力系统 · 数学 2021-04-20 Alex Rutar

We prove that a system of locally interacting diffusions carrying discrete masses, subject to an environmental noise and undergoing mass coagulation, converges to a system of Stochastic Partial Differential Equations (SPDEs) with…

概率论 · 数学 2022-03-15 Franco Flandoli , Ruojun Huang

We examine homogeneous metrics on spheres and determine which ones have positive sectional curvature. The answer is subtle and surprisingly difficult to prove. In some cases we also determine their pinching constants. This completes the…

微分几何 · 数学 2009-09-29 Luigi Verdiani , Wolfgang Ziller

In this paper, we study the eikonal equation in metric measure spaces, where the inhomogeneous term is allowed to be discontinuous, unbounded and merely $p$-integrable in the domain with a finite $p$. For continuous eikonal equations, it is…

偏微分方程分析 · 数学 2023-08-15 Qing Liu , Nageswari Shanmugalingam , Xiaodan Zhou

Existence of solution of the logarithmic Minkowski problem is proved for the case where the discrete measures on the unit sphere satisfy the subspace concentration condition with respect to some special proper subspaces. In order to…

度量几何 · 数学 2015-06-04 Karoly J. Boroczky , Pal Hegedus , Guangxian Zhu