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We prove that if $M$ is a closed $n$-dimensional Riemannian manifold, $n \ge 3$, with ${\rm Ric}\ge n-1$ and for which the optimal constant in the critical Sobolev inequality equals the one of the $n$-dimensional sphere $\mathbb{S}^n$, then…

Differential Geometry · Mathematics 2022-06-10 Francesco Nobili , Ivan Yuri Violo

We consider a broad class of nonlinear integro-differential equations with a kernel whose differentiability order is described by a general function $\phi$. This class includes not only the fractional $p$-Laplace equations, but also…

Analysis of PDEs · Mathematics 2025-06-17 Jihoon Ok , Kyeong Song

The Borell-Brascamp-Lieb inequality is a classical extension of the Pr\'ekopa-Leindler inequality, which in turn is a functional counterpart of the Brunn-Minkowski inequality. The stability of these inequalities has received significant…

Functional Analysis · Mathematics 2025-01-09 Alessio Figalli , Peter van Hintum , Marius Tiba

We investigate the rigidity problem for the logarithmic Sobolev inequality on weighted Riemannian manifolds satisfying $\mathrm{Ric}_{\infty} \ge K>0$. Assuming equality holds, we show that the $1$-dimensional Gaussian space is necessarily…

Differential Geometry · Mathematics 2024-09-11 Shin-ichi Ohta , Asuka Takatsu

We demonstrate that modulation of the local strength of the cubic self-focusing (SF) nonlinearity in the two-dimensional (2D) geometry, in the form of a circle with contrast $\Delta g$ of the SF coefficient relative to the ambient medium…

Pattern Formation and Solitons · Physics 2016-04-13 Hidetsugu Sakaguchi , Boris A. Malomed

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…

Analysis of PDEs · Mathematics 2012-03-30 Nobu Kishimoto

In this paper, we first establish a kind of weighted space-time $L^2$ estimate, which belongs to Keel-Smith-Sogge type estimates, for perturbed linear elastic wave equations. This estimate refines the corresponding one established by the…

Analysis of PDEs · Mathematics 2018-02-23 Kunio Hidano , Dongbing Zha

The purpose of this work is to establish a quantitative and constructive stability result for a class of subcritical Gagliardo-Nirenberg-Sobolev inequalities which interpolates between the logarithmic Sobolev inequality and the standard…

Analysis of PDEs · Mathematics 2025-02-07 Matteo Bonforte , Jean Dolbeault , Bruno Nazaret , Nikita Simonov

The strong convergence of an explicit full-discrete scheme is investigated for the stochastic Burgers-Huxley equation driven by additive space-time white noise, which possesses both Burgers-type and cubic nonlinearities. To discretize the…

Numerical Analysis · Mathematics 2026-04-21 Yibo Wang , Wanrong Cao , Yanzhao Cao

We establishe an affine Hardy-Littlewood-Sobolev inequality concerning two different functions which is stronger than the classical Hardy-Littlewood-Sobolev inequality. Furthermore, we also prove reverse inequalities for the new…

Functional Analysis · Mathematics 2025-08-05 Youjiang Lin , Jinghong Zhou , Jiaming Lan

In this article we present local well-posedness results in the classical Sobolev space H^s(R) with s > 1/4 for the Cauchy problem of the Gardner equation, overcoming the problem of the loss of the scaling property of this equation. We also…

Analysis of PDEs · Mathematics 2011-10-20 Miguel A. Alejo

We introduce a notion of $\xi$-stability on the affine grassmannian $\xx$ for the classical groups, this is the local version of the $\xi$-stability on the moduli space of Higgs bundles on a curve introduced by Chaudouard and Laumon. We…

Algebraic Geometry · Mathematics 2015-09-18 Zongbin Chen

The objective of this paper is two-fold. First, we establish new sharp quantitative estimates for Faber-Krahn inequalities on simply connected space forms. We prove that the gap between the first eigenvalue of a given set $\Omega$ and that…

Analysis of PDEs · Mathematics 2023-04-03 Mark Allen , Dennis Kriventsov , Robin Neumayer

This paper extends a stability estimate of the Sobolev Inequality established by G. Bianchi and H. Egnell in their paper "A note on the Sobolev Inequality." Bianchi and Egnell's Stability Estimate answers the question raised by H. Brezis…

Analysis of PDEs · Mathematics 2020-09-04 Francis Seuffert

In this article, we communicate with the glimpse of the proofs of global regularity results for weak solutions to a class of problems involving fractional $(p,q)$-Laplacian, denoted by $(-\Delta)^{s_1}_{p}+(-\Delta)^{s_2}_{q}$, for $s_2,…

Analysis of PDEs · Mathematics 2022-02-08 J. Giacomoni , D. Kumar , K. Sreenadh

We prove a sharp stability result for the Brunn-Minkowski inequality for $A,B\subset\mathbb{R}^2$. Assuming that the Brunn-Minkowski deficit $\delta=|A+B|^{\frac{1}{2}}/(|A|^\frac12+|B|^\frac12)-1$ is sufficiently small in terms of…

Functional Analysis · Mathematics 2019-11-28 Peter van Hintum , Hunter Spink , Marius Tiba

In this paper, we study the global regularity and sharp decay rates for the isentropic hypo-viscous compressible Navier-Stokes equations in 1D. Firstly, we prove the global stability for the small initial data near a stable equilibrium.…

Analysis of PDEs · Mathematics 2026-03-17 Chen Liang , Zhaonan Luo , Zhaoyang Yin

We obtain sharp fractional Hardy inequalities for the half-space and for convex domains. We extend the results of Bogdan and Dyda and of Loss and Sloane to the setting of Sobolev-Bregman forms.

Analysis of PDEs · Mathematics 2026-01-05 Michał Kijaczko , Julia Lenczewska

We consider the Cauchy problem associated to the recently derived higher order hamiltonian model for unidirectional water waves and prove global existence for given data in the Sobolev space $H^s$, $s\geq 1$. We also prove an ill-posedness…

Analysis of PDEs · Mathematics 2019-06-27 Mahendra Panthee , Xavier Carvajal

Employing the affine normal flow, we prove a stability version of the $p$-affine isoperimetric inequality for $p\geq1$ in $\mathbb{R}^2$ in the class of origin-symmetric convex bodies. That is, if $K$ is an origin-symmetric convex body in…

Differential Geometry · Mathematics 2013-03-28 Mohammad N. Ivaki