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This paper investigates the stability properties of a nonlinear fractional differential equation with two discrete delays and a delay-dependent coefficient. Such equations arise in various biological and control systems where temporal…

动力系统 · 数学 2026-03-12 Pragati Dutta , Sachin Bhalekar

The stability of two bubbles rising initially in-line through a viscous liquid is revisited using a global linear stability analysis formulated within an Arbitrary Lagrangian-Eulerian framework, complemented by fully resolved Embedded…

流体动力学 · 物理学 2026-03-10 Wei-Qiang Liu , Jian-Ming Jiang , Jie Zhang

The Lamb-Chaplygin dipole is a traveling wave solution to the 2D incompressible Euler equation, whose orbital stability was established in [Abe-Choi, 2022] and [Abe-Choi-Jeong, 2025] assuming the odd symmetry in $x_2$ (O) and non-negativity…

偏微分方程分析 · 数学 2026-05-05 Zexing Li , Peicong Song , Tao Zhou

For solution $u(x,t)$ to degenearte parabolic equations in a bounded domain $\Omega$ with homogenous boundary condition, we consider backward problems in time: determine $u(\cdot,t_0)$ in $\Omega$ by $u(\cdot,T)$, where $t$ is the time…

偏微分方程分析 · 数学 2023-05-02 Piermarco Cannarsa , Masahiro Yamamoto

In this article we consider the stability and damping problem for the 2D Boussinesq equations with partial dissipation near a two parameter family of stationary solutions which includes Couette flow and hydrostatic balance. In the first…

偏微分方程分析 · 数学 2020-04-20 Christian Zillinger

We consider second-order evolution equations in an abstract setting with damping and time delay and give sufficient conditions ensuring exponential stability. Our abstract framework is then applied to the wave equation, the elasticity…

偏微分方程分析 · 数学 2013-08-26 Serge Nicaise , Cristina Pignotti

In this paper, we present sharp stability results for various reverse isoperimetric problems in $\mathbb R^2$. Specifically, we prove the stability of the reverse isoperimetric inequality for $\lambda$-convex bodies -- convex bodies with…

微分几何 · 数学 2026-01-07 Kostiantyn Drach , Kateryna Tatarko

In the paper, new estimates of the Lebesgue constant $$ \mathcal{L}(W)=\frac1{(2\pi)^d}\int_{\mathbb{T}^d}\bigg|\sum_{{k}\in W\cap \mathbb{Z}^d} e^{i({k},\,{x})}\bigg| {\rm d}{ x} $$ for convex polyhedra $W\subset\mathbb{R}^d$ are obtained.…

经典分析与常微分方程 · 数学 2018-01-03 Yurii Kolomoitsev , Tetiana Lomako

This paper is devoted to the study of secondary resonances and the stability of the Lagrangian point L4 in the spatial restricted three-body problem for moderate mass ratios (mu), meaning that mu is smaller than 0.0045. However, we…

地球与行星天体物理 · 物理学 2017-08-23 Richard Schwarz , Akos Bazso , Balint Erdi , Barbara Funk

In the Bayesian approach, the a priori knowledge about the input of a mathematical model is described via a probability measure. The joint distribution of the unknown input and the data is then conditioned, using Bayes' formula, giving rise…

统计理论 · 数学 2015-06-15 Sebastian J. Vollmer

For exponents in the subcritical range, we revisit some optimal interpolation inequalities on the sphere with carr\'e du champ methods and use the remainder terms to produce improved inequalities. The method provides us with lower estimates…

偏微分方程分析 · 数学 2019-08-23 Jean Dolbeault , Maria J. Esteban

We consider Gagliardo-Nirenberg inequalities on the sphere which interpolate between the Poincar\'e inequality and the Sobolev inequality, and include the logarithmic Sobolev inequality as a special case. We establish explicit stability…

偏微分方程分析 · 数学 2024-01-24 Giovanni Brigati , Jean Dolbeault , Nikita Simonov

In this paper we address the global stability problem for double-bubbles in the plane. This is accomplished by combining the "improved convergence theorem" for planar clusters developed in arXiv:1409.6652 with an ad hoc analysis of the…

偏微分方程分析 · 数学 2015-04-23 Marco Cicalese , Gian Paolo Leonardi , Francesco Maggi

In this paper, we review recent results on stability and instability in logarithmic Sobolev inequalities, with a particular emphasis on strong norms. We consider several versions of these inequalities on the Euclidean space, for the…

偏微分方程分析 · 数学 2025-11-14 Giovanni Brigati , Jean Dolbeault , Nikita Simonov

Here we are investigating the one dimensional inverse source problem for Helmholtz equation where the source function is compactly supported in our domain. We show that increasing stability possible using multi-frequency wave at the two end…

偏微分方程分析 · 数学 2019-09-09 Shahah Almutairi , Ajith Gunaratne

Following the approach of [E1, M1, M2, S1, S2, SZJV] for reaction diffusion systems, we justify rigorously the Eckhaus stability criterion for stability of convective Turing patterns, as derived formally by complex Ginzburg-Landau…

动力系统 · 数学 2025-06-30 Aric Wheeler , Kevin Zumbrun

We establish a double logarithmic stability inequality for the problem of determining the initial data in an IBVP for the wave equation outside a non-trapping obstacle from two localized measurements.

偏微分方程分析 · 数学 2024-01-05 Mourad Choulli

Let $\alpha\in (0,2)$, let $${\cal E}(u,u)=\int_{\Bbb R^d}\int_{\Bbb R^d} (u(y)-u(x))^2\frac{A(x,y)}{|x-y|^{d+\alpha}}\, dy\, dx$$ be the Dirichlet form for a stable-like operator, let $$\Gamma u(x)=\int_{\Bbb R^d}…

泛函分析 · 数学 2024-11-05 Richard F. Bass , Hua Ren

Using the construction of a Lyapunov function, it is shown that the Douglas-Rachford iteration with respect to a sphere and a line in $\mathbb R^d$ is robustly $\mathcal{KL}$-stable. This implies a convergence which is stronger than uniform…

最优化与控制 · 数学 2016-09-29 Ohad Giladi

The profiles of narrow lattice solitons are calculated analytically using perturbation analysis. A stability analysis shows that solitons centered at a lattice (potential) maximum are unstable, as they drift toward the nearest lattice…

斑图形成与孤子 · 物理学 2009-11-13 Y. Sivan , G. Fibich , N. K. Efremidis , S. Bar-Ad
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