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This article is concerned with the local well-posedness problem for the compressible Euler equations in gas dynamics. For this system we consider the free boundary problem which corresponds to a physical vacuum. Despite the clear physical…

偏微分方程分析 · 数学 2023-03-28 Mihaela Ifrim , Daniel Tataru

A global existence theorem on weak solutions is shown for the continuous coagulation equation with collisional breakage under certain classes of unbounded collision kernels and distribution functions. This model describes the dynamics of…

偏微分方程分析 · 数学 2018-05-28 Prasanta Kumar Barik , Ankik Kumar Giri

We try to improve the Thomas-Fermi model for the total energy and electron density of atoms and molecules by directly modifying the Euler equation for the electron density, which we argue is less affected by nonlocal corrections. Here we…

统计力学 · 物理学 2007-05-23 Jeng-Da Chai , John D. Weeks

In this paper, we study the nonlinear Vlasov-Fokker-Planck equation with fixed collision frequency. We establish the global-in-time existence of weak solutions to the equation with large initial data. Moreover, we show that our solution…

偏微分方程分析 · 数学 2024-07-18 Young-Pil Choi , Byung-Hoon Hwang , Yeongseok Yoo

We are concerned with the global existence of finite-energy entropy solutions of the one-dimensional compressible Euler equations with (possibly) damping, alignment forces, and nonlocal interactions: Newtonian repulsion and quadratic…

偏微分方程分析 · 数学 2024-03-14 Jose A. Carrillo , Gui-Qiang G. Chen , Difan Yuan , Ewelina Zatorska

This paper is dedicated to the global existence of entropy weak solutions for the Poisson-Nernst-Planck-Compressible Navier-Stokes system in a periodic domain $\Pi$ d when the shear viscosity $\mu$($\rho$) = $\mu$ $\rho$ with $\mu$ to be…

偏微分方程分析 · 数学 2026-03-13 Didier Bresch , Maria Kazakova , Charlotte Tonnelier

This paper is mainly concerned with the robustly stable adaptive control of single-input single-output impulse-free linear time-invariant singular dynamic systems of known order and unknown parameterizations subject to single external point…

最优化与控制 · 数学 2008-04-07 M. De la Sen

In this paper, we examine the question of the boundary controllability of the one-dimensional non-isentropic Euler equation for compressible polytropic gas, in the context of weak entropy solutions. We consider the system in Eulerian…

最优化与控制 · 数学 2013-04-16 Olivier Glass

In the first part of this paper, we apply a well known discrete-to-continuum approach to a Frenkel-Kontorova-type model of an infinitely long one-dimensional chain of atoms weakly interacting with a line of fixed atoms. The rescaled model…

数学物理 · 物理学 2025-10-16 Dmitry Golovaty , J. Patrick Wilber

An implicit Euler finite-volume scheme for a nonlocal cross-diffusion system on the one-dimensional torus, arising in population dynamics, is proposed and analyzed. The kernels are assumed to be in detailed balance and satisfy a weak…

数值分析 · 数学 2023-02-23 Ansgar Jüngel , Stefan Portisch , Antoine Zurek

In symmetric gravitating systems experiencing rapid mass loss, particle orbits change almost instantaneously, which can lead to the development of a sharply contoured density profile, including singular caustics for collisionless systems.…

星系天体物理 · 物理学 2017-10-25 Zephyr Penoyre , Zoltán Haiman

We study the three-dimensional isothermal Euler equations with linear damping and an exterior potential. For sufficiently large damping, we prove global well-posedness for arbitrarily large initial data by combining a parabolic comparison…

偏微分方程分析 · 数学 2025-09-30 Young-Pil Choi , Houzhi Tang , Weiyuan Zou

Universal behaviour in few-bosons systems close to the unitary limit, where two bosons become unbound, has been intensively investigated in recent years both experimentally and theoretically. In this particular region, called the unitary…

量子气体 · 物理学 2021-01-04 A. Kievsky , A. Polls , B. Juliá-Díaz , N. K. Timofeyuk , M. Gattobigio

We consider a fluid-structure interaction problem with Navier-slip boundary conditions in which the fluid is considered as a non-Newtonian fluid and the structure is described by a nonlinear multi-layered model. The fluid domain is driven…

偏微分方程分析 · 数学 2021-02-02 Wenjun Liu , Yadong Liu , Jun Yu

Recently a restriction ("quantum inequality-type relation") on the (renormalized) energy density measured by a static observer in a "globally static" (ultrastatic) spacetime has been formulated by Pfenning and Ford for the minimally coupled…

广义相对论与量子宇宙学 · 物理学 2009-10-30 Dae-Yup Song

This paper presents a systematic study of the properties of non-rotating stellar models governed by the Euler-Poisson system under general equations of state, including the case of polytropic gaseous stars. We revisit and extend existence…

偏微分方程分析 · 数学 2026-04-22 Hangsheng Chen

We investigate the cosmological constraining power of combined weak galaxy lensing and galaxy clustering probes, i.e. $3\times2$-point analyses, assuming flexible models for redshift uncertainty, and Lagrangian perturbation theory and…

宇宙学与河外天体物理 · 物理学 2026-03-12 Joseph DeRose , Noah Weaverdyck , Martin White , Shi-Fan Chen , David Schlegel , Anže Slosar

We consider particles on a one-dimensional lattice whose evolution is governed by nearest-neighbor interactions where particles that have reached size zero are removed from the system. Concentrating on configurations with infinitely many…

偏微分方程分析 · 数学 2016-10-20 Michael Helmers , Barbara Niethammer , Juan J. L. Velazquez

We study the critical thresholds for the compressible pressureless Euler equations with pairwise attractive or repulsive interaction forces and non-local alignment forces in velocity in one dimension. We provide a complete description for…

偏微分方程分析 · 数学 2015-05-26 José A. Carrillo , Young-Pil Choi , Eitan Tadmor , Changhui Tan

The development of efficient and robust dynamic models is fundamental in the field of systems and control engineering. In this paper, a new formulation for the dynamic model of nonlinear mechanical systems, that can be applied to different…

系统与控制 · 电气工程与系统科学 2026-02-09 Davide Tebaldi , Roberto Zanasi