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In this thesis we study the principle that extremal objects in differential geometry correspond to stable objects in algebraic geometry. In our introduction we survey the most famous instances of this principle with a view towards the…

微分几何 · 数学 2023-02-13 John Benjamin McCarthy

In this article, global stabilization results for the Benjamin-Bona-Mahony-Burgers' (BBM-B) type equations are obtained using nonlinear Neumann boundary feedback control laws. Based on the $C^0$-conforming finite element method, global…

数值分析 · 数学 2018-12-06 Sudeep Kundu , Amiya Kumar Pani

The generalized harmonic representation of Einstein's equation is manifestly hyperbolic for a large class of gauge conditions. Unfortunately most of the useful gauges developed over the past several decades by the numerical relativity…

广义相对论与量子宇宙学 · 物理学 2008-11-26 Lee Lindblom , Keith D. Matthews , Oliver Rinne , Mark A. Scheel

Finite time blow up vs global regularity question for 3D Euler equation of fluid mechanics is a major open problem. Several years ago, Luo and Hou \cite{HouLuo14} proposed a new finite time blow up scenario based on extensive numerical…

偏微分方程分析 · 数学 2020-10-05 Siming He , Alexander Kiselev

In this paper, we investigate the local-in-time well-posedness for the two-dimensional Prandtl equations in weighted Sobolev spaces under the Oleinik's monotonicity condition.Due to the loss of tangential derivative caused by vertical…

偏微分方程分析 · 数学 2018-11-30 Jincheng Gao , Daiwen Huang , Zheng-an Yao

It is known that the singularity in the non-cutoff cross-section of the Boltzmann equation leads to the gain of regularity and gain of weight in the velocity variable. By defining and analyzing a non-isotropy norm which precisely captures…

偏微分方程分析 · 数学 2010-10-28 Radjesvarane Alexandre , Yoshinori Morimoto , Seiji Ukai , Chao-Jiang Xu , Tong Yang

We consider the existence of steady rarefied flows of polyatomic gas between two parallel condensed phases, where evaporation and condensation processes occur. To this end, we study the existence problem of stationary solutions in a…

偏微分方程分析 · 数学 2025-03-18 Ki-Nam Hong , Marwa Shahine , Seok-Bae Yun

We investigate global and local regularity of generalized solutions to parabolic initial-boundary value problem for Petrovskii system of second order differential equations. Results are formulated in terms of the belonging of right-hand…

偏微分方程分析 · 数学 2022-06-09 Oleksandr Diachenko , Valerii Los

The departure of a granular gas in the instable region of parameters from the initial homogeneous cooling state is studied. Results from Molecular Dynamics and from Direct Monte Carlo simulation of the Boltzmann equation are compared. It is…

统计力学 · 物理学 2009-11-10 J. Javier Brey , M. J. Ruiz-Montero

We establish the convergence to the equilibrium for various linear collisional kinetic equations (including linearized Boltzmann and Landau equations) with physical local conservation laws in bounded domains with general Maxwell boundary…

偏微分方程分析 · 数学 2021-02-16 Armand Bernou , Kleber Carrapatoso , Stéphane Mischler , Isabelle Tristani

In this article we study the Gevrey regularization effect for the spatially inhomogeneous Boltzmann equation without angular cutoff. This equation is partially elliptic in the velocity direction and degenerates in the spatial variable. We…

偏微分方程分析 · 数学 2018-06-01 Hua Chen , Xin Hu , Wei-Xi Li , Jinpeng Zhan

Boundaries occur naturally in kinetic equations and boundary effects are crucial for dynamics of dilute gases governed by the Boltzmann equation. We develop a mathematical theory to study the time decay and continuity of Boltzmann solutions…

偏微分方程分析 · 数学 2015-05-13 Yan Guo

Regularity of the Boltzmann equation, particularly in the presence of physical boundary conditions, heavily relies on the geometry of the boundaries. In the case of non-convex domains with specular reflection boundary conditions, the…

偏微分方程分析 · 数学 2026-05-26 Gayoung An , Donghyun Lee

In the literature on singular perturbation (Lavrentiev regularization) for the stable approximate solution of operator equations with monotone operators in the Hilbert space the phenomena of conditional stability and local well-posedness…

数值分析 · 数学 2016-11-23 Radu Ioan Bot , Bernd Hofmann

This paper establishes the local-in-time well-posedness of solutions to an approximating system constructed by mildly regularizing the dynamical sea-ice model of {\it W.D. Hibler, Journal of Physical Oceanography, 1979}. Our choice of…

偏微分方程分析 · 数学 2022-06-08 Xin Liu , Marita Thomas , Edriss S. Titi

In this talk we consider the issue of stabilization of compact hyperbolic brane-world scenarios from the point of view of 4-dimensional effective theories. The idea is to clarify the status of stabilization for these models. Possible ways…

高能物理 - 理论 · 物理学 2007-05-23 Pedro J. Silva

We derive the second-order hydrodynamic equation and the microscopic formulae of the relaxation times as well as the transport coefficients systematically from the relativistic Boltzmann equation. Our derivation is based on a novel…

高能物理 - 唯象学 · 物理学 2016-02-01 Kyosuke Tsumura , Yuta Kikuchi , Teiji Kunihiro

In this paper, we consider the existence problem for a stationary relaxational models of the quantum Boltzmann equation. More precisely, we establish the existence of mild solution to the fermionic or bosonic quantum BGK model in a slab…

偏微分方程分析 · 数学 2020-01-29 Gi-Chan Bae , Seok-Bae Yun

In a Hilbert space setting, we study the stability properties of the regularized continuous Newton method with two potentials, which aims at solving inclusions governed by structured monotone operators. The Levenberg-Marquardt…

最优化与控制 · 数学 2024-10-25 Boushra Abbas

Convergence to stationary solutions in fully nonlinear parabolic systems with general nonlinear boundary conditions is shown in situations where the set of stationary solutions creates a $C^2$-manifold of finite dimension which is normally…

偏微分方程分析 · 数学 2014-09-10 Helmut Abels , Nasrin Arab , Harald Garcke
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