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We prove the pathwise well-posedness of stochastic porous media and fast diffusion equations driven by nonlinear, conservative noise. As a consequence, the generation of a random dynamical system is obtained. This extends results of the…

偏微分方程分析 · 数学 2019-01-09 Benjamin Fehrman , Benjamin Gess

We prove the existence of global, smooth solutions to the 2D Muskat problem in the stable regime whenever the product of the maximal and minimal slopes is strictly less than 1. The curvature of these solutions solutions decays to 0 as $t$…

偏微分方程分析 · 数学 2018-10-31 Stephen Cameron

In a recent result of Gerard-Varet and Dormy [5], they established ill-posedness for the Cauchy problem of the linearized Prandtl equation around non-monotic special solution which is independent of x and satisfies the heat equation. In [6]…

偏微分方程分析 · 数学 2016-11-25 Ding Yutao

This paper is about Holder and Lipschitz stability estimates and uniqueness theorems for some coefficient inverse problems and associated inverse source problems for a general linear parabolic equation of the second order with variable…

数学物理 · 物理学 2024-01-17 Michael V. Klibanov

In this paper we are concerned with the local well-posedness of the unsteady potential flows near a space corner of right angle, which could be formulated as an initial-boundary value problem of a hyperbolic equation of second order in a…

偏微分方程分析 · 数学 2022-11-03 Beixiang Fang , Wei Xiang , Feng Xiao

In the present article, we prove the sharp local well-posedness and ill-posedness results for the "good" Boussinesq equation on $\mathbb{T}$; the initial value problem is locally well-posed in $H^{-1/2}(\mathbb{T})$ and ill-posed in…

偏微分方程分析 · 数学 2012-03-30 Nobu Kishimoto

We study the inverse problem of recovering the order and the diffusion coefficient of an elliptic fractional partial differential equation from a finite number of noisy observations of the solution. We work in a Bayesian framework and show…

偏微分方程分析 · 数学 2017-06-28 Nicolas Garcia Trillos , Daniel Sanz-Alonso

This article is devoted to forward and inverse problems associated with time-independent semilinear nonlocal wave equations. We first establish comprehensive well-posedness results for some semilinear nonlocal wave equations. The main…

偏微分方程分析 · 数学 2024-02-09 Yi-Hsuan Lin , Teemu Tyni , Philipp Zimmermann

We study the well-posedness of the initial value problem on periodic intervals for linear and quasilinear evolution equations for which the leading-order terms have three spatial derivatives. In such equations, there is a competition…

偏微分方程分析 · 数学 2012-05-15 J. Douglas Wright , David M. Ambrose

We establish both Lipschitz and logarithmic stability estimates for an inverse flux problem and subsequently apply these results to an inverse boundary coefficient problem. Furthermore, we demonstrate how the stability inequalities derived…

偏微分方程分析 · 数学 2025-11-14 Mourad Choulli , Shuai Lu , Hiroshi Takase

We prove that the Cauchy problem for the two-dimensional Zakharov system is locally well-posed for initial data which are localized perturbations of a line solitary wave. Furthermore, for this Zakharov system, we prove weak convergence to a…

偏微分方程分析 · 数学 2018-03-22 Hung Luong

The Riemann-Hilbert approach is extended to discuss the well-posedness of the nonlinear Schr\"odinger-Gerdjikov-Ivanon equation. The Lipschitz continuity of potential in $H^{2}(\mathbb{R})\cap H^{1,1}(\mathbb{R})$ to scattering data is…

偏微分方程分析 · 数学 2025-11-25 Sucai Niu , Junyi Zhu

Results on the problem of stabilizing a nonlinear continuous-time system by a finite number of control or measurement values are presented. The basic tool is a discontinuous version of the so-called semi-global backstepping lemma. We derive…

最优化与控制 · 数学 2010-04-13 C. De Persis

We consider the well-posedness of the surface quasi-geostrophic (SQG) front equation. Hunter-Shu-Zhang [9] established well-posedness under a small data condition as well as a convergence condition on an expansion of the equation's…

偏微分方程分析 · 数学 2023-03-15 Albert Ai , Ovidiu-Neculai Avadanei

A review of the author's results is given. Inversion formulas and stability estimates for the solutions to 3D inverse scattering problems with fixed-energy data are obtained. Inversions of exact and noisy data are stidied. The inverse…

数学物理 · 物理学 2007-05-23 Alexander G. Ramm

We investigate the well-posedness of the radiative transfer equation with polarization and varying refractive index. The well-posedness analysis includes non-homogeneous boundary value problems on bounded spatial domains, which requires the…

偏微分方程分析 · 数学 2022-03-08 Vincent Bosboom , Matthias Schlottbom , Felix Schwenninger

This paper aims at studying a generalized Camassa--Holm equation under random perturbation. We establish a local well-posedness result in the sense of Hadamard, i.e., existence, uniqueness and continuous dependence on initial data, as well…

偏微分方程分析 · 数学 2023-04-04 Yingting Miao , Christian Rohde , Hao Tang

The concern of this paper is the Cauchy problem for the Prandtl equation. This problem is known to be well-posed for analytic data, or for data with monotonicity properties. We prove here that it is linearly ill-posed in Sobolev type…

偏微分方程分析 · 数学 2015-05-13 David Gerard-Varet , Emmanuel Dormy

In [2] we introduced a method combining together an observability inequality and a spectral decomposition to get a logarithmic stability estimate for the inverse problem of determining both the potential and the damping coefficient in a…

偏微分方程分析 · 数学 2015-05-28 Kais Ammari , Mourad Choulli

We study the continuity properties of optimal solutions to stochastic control problems with respect to initial probability measures and applications of these to the robustness of optimal control policies applied to systems with incomplete…

系统与控制 · 计算机科学 2019-04-16 Ali Devran Kara , Serdar Yüksel