Results 31 to 40 of about 191 (141)

New Lower Bounds on the Radius of Spatial Analyticity for the Third‐Order Nonlinear Schrödinger Equation

open access: yesJournal of Applied Mathematics, Volume 2026, Issue 1, 2026.
In this paper, we consider the initial value problem associated with the cubic nonlinear Schrödinger equation with third‐order dispersion ∂tu+iα∂x2u+β∂x3u+iγu2u=0,x∈ℝ,t∈ℝ,ux,0=u0x, where α, β and γ are real constants such that β, γ ≠ 0, u is a complex valued function and the initial data u0 is analytic on ℝ and has a uniform radius of analyticity σ0 in
Tegegne Getachew, Xiasheng Shi
wiley   +1 more source

Hölder Estimates for the Homogenization of a Curl–Div System Related to Maxwell’s Equations With VMO Coefficients

open access: yesJournal of Mathematics, Volume 2026, Issue 1, 2026.
In this paper, we consider the curl–div system: ∇×(A(x/ε)∇×uε) = ∇×f and ∇⋅uε = 0 with rapidly oscillating periodic coefficients. This system is related to Maxwell’s equations and has a structure different from that of general elliptic systems. Under VMO coefficients, we establish the uniform interior Hölder estimates and local boundary Hölder ...
Zhihong Chen, Dimitri Mugnai
wiley   +1 more source

On the Holomorphic Extension of Solutions of Elliptic Pseudodifferential Equations [PDF]

open access: yes, 2012
2010 Mathematics Subject Classification: 35B65, 35S05, 35A20.We derive analytic estimates and holomorphic extensions for the solutions of a class of elliptic pseudodifferential equations on ...
Nicola, Fabio, Cappiello, Marco
core  

A Note on Div-Curl Lemma [PDF]

open access: yes, 2007
2000 Mathematics Subject Classification: 42B30, 46E35, 35B65.We prove two results concerning the div-curl lemma without assuming any sort of exact cancellation, namely the divergence and curl need not be zero, and $$div(u^−v^→) ∈ H^1(R^d)$$ which include
Gala, Sadek
core  

A non-smooth Brezis-Oswald uniqueness result

open access: yesOpen Mathematics, 2023
We classify the non-negative critical points in W01,p(Ω){W}_{0}^{1,p}\left(\Omega ) of J(v)=∫ΩH(Dv)−F(x,v)dx,J\left(v)=\mathop{\int }\limits_{\Omega }\hspace{0.15em}H\left(Dv)-F\left(x,v){\rm{d}}x, where HH is convex and positively pp-homogeneous, while ...
Mosconi Sunra
doaj   +1 more source

Gradient estimate of a variable power for nonlinear elliptic equations with Orlicz growth

open access: yesAdvances in Nonlinear Analysis, 2020
In this paper, we prove a global Calderón-Zygmund type estimate in the framework of Lorentz spaces for a variable power of the gradients to the zero-Dirichlet problem of general nonlinear elliptic equations with the nonlinearities satisfying Orlicz ...
Liang Shuang, Zheng Shenzhou
doaj   +1 more source

Interpolation inequalities for weak solutions of nonlinear parabolic systems [PDF]

open access: yes, 2011
The authors investigate differentiability of the solutions of nonlinear parabolic systems of order 2 m in divergence form of the following type ∑ | α | ≤ m ( - 1 ) | α | D α a α X , D u +
Giuseppe Floridia   +9 more
core   +1 more source

New Results About the Lambda Constant and Ground States of the 𝑊-Functional

open access: yesAdvanced Nonlinear Studies, 2020
In this paper, we study properties of the lambda constants and the existence of ground states of Perelman’s famous W-functional from a variational formulation. We have two kinds of results.
Ma Li
doaj   +1 more source

Optimal global second-order regularity and improved integrability for parabolic equations with variable growth

open access: yesAdvances in Nonlinear Analysis
We consider the homogeneous Dirichlet problem for the parabolic equation ut−div(∣∇u∣p(x,t)−2∇u)=f(x,t)+F(x,t,u,∇u){u}_{t}-{\rm{div}}({| \nabla u| }^{p\left(x,t)-2}\nabla u)=f\left(x,t)+F\left(x,t,u,\nabla u) in the cylinder QT≔Ω×(0,T){Q}_{T}:= \Omega ...
Arora Rakesh, Shmarev Sergey
doaj   +1 more source

Hölder gradient estimates for a class of singular or degenerate parabolic equations

open access: yesAdvances in Nonlinear Analysis, 2017
We prove interior Hölder estimates for the spatial gradients of the viscosity solutions to the singular or degenerate parabolic ...
Imbert Cyril   +2 more
doaj   +1 more source

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