Results 11 to 20 of about 127 (42)

Impulsive nonlocal nonlinear parabolic differential problems

open access: yesInternational Journal of Stochastic Analysis, Volume 6, Issue 3, Page 247-260, 1993., 1993
The aim of the paper is to prove a theorem about a weak impulsive nonlinear parabolic differential inequality together with weak impulsive nonlocal nonlinear inequalities. A weak maximum principle for an impulsive nonlinear parabolic differential inequality together with weak impulsive nonlocal nonlinear inequalities and an uniqueness criterion for the
Ludwik Byszewski
wiley   +1 more source

On the longtime behavior of a viscous Cahn-Hilliard system with convection and dynamic boundary conditions [PDF]

open access: yes, 2018
In this paper, we study the longtime asymptotic behavior of a phase separation process occurring in a three-dimensional domain containing a fluid flow of given velocity. This process is modeled by a viscous convective Cahn-Hilliard system, which consists
Colli, Pierluigi   +2 more
core   +3 more sources

Strong maximum principles for parabolic nonlinear problems with nonlocal inequalities together with integrals

open access: yesInternational Journal of Stochastic Analysis, Volume 3, Issue 1, Page 65-79, 1990., 1990
In [4] and [5], the author studied strong maximum principles for nonlinear parabolic problems with initial and nonlocal inequalities, respectively. Our purpose here is to extend results in [4] and [5] to strong maximum principles for nonlinear parabolic problems with nonlocal inequalities together with integrals.
Ludwik Byszewski
wiley   +1 more source

A geometric characterization of a sharp Hardy inequality [PDF]

open access: yes, 2011
In this paper, we prove that the distance function of an open connected set in $\mathbb R^{n+1}$ with a $C^{2}$ boundary is superharmonic in the distribution sense if and only if the boundary is {\em weakly mean convex}.
Lewis, Roger T., Li, Junfang, Li, Yanyan
core   +2 more sources

A Liouville comparison principle for solutions of semilinear parabolic inequalities in the whole space

open access: yesAdvances in Nonlinear Analysis, 2014
We obtain a new Liouville comparison principle for weak solutions (u,v) of semilinear parabolic second-order partial differential inequalities of the form ut-ℒu-|u|q-1u≥vt-ℒv-|v|q-1v(*)$u_t -{\mathcal {L}}u- |u|^{q-1}u\ge v_t -{\mathcal {L}}v- |v|^{q-1}v\
Kurta Vasilii V.
doaj   +1 more source

SOME NONLINEAR DIFFERENTIAL INEQUALITIES AND AN APPLICATION TO HÖLDER CONTINUOUS ALMOST COMPLEX STRUCTURES [PDF]

open access: yes, 2011
. We consider some second order quasilinear partial differential inequalities for real valued functions on the unit ball and find conditions under which there is a lower bound for the supremum of nonnegative solutions that do not vanish at the origin. As
Adam Coffman, Yifei Pan
core   +1 more source

A Liouville comparison principle for solutions of quasilinear singular parabolic inequalities

open access: yesAdvances in Nonlinear Analysis, 2015
We obtain a Liouville comparison principle for entire weak solutions (u,v) of quasilinear singular parabolic second-order partial differential inequalities of the form ut-A(u)-|u|q-1u≥vt-A(v)-|v|q-1v${ u_t - A(u)-|u|^{q-1}u \ge v_t - A (v)-|v|^{q-1}v ...
Kurta Vasilii V.
doaj   +1 more source

Bifurcation analysis of a predator-prey system with self- and cross-diffusion and constant harvesting rate [PDF]

open access: yes, 2014
In this paper, we focus on a ratio dependent predator-prey system with self- and cross-diffusion and constant harvesting rate. By making use of a brief stability and bifurcation analysis, we derive the symbolic conditions for Hopf, Turing and wave ...
Baek, H.
core   +2 more sources

Uniqueness and comparison principles for semilinear equations and inequalities in Carnot groups

open access: yesAdvances in Nonlinear Analysis, 2018
Variants of the Kato inequality are proved for distributional solutions of semilinear equations and inequalities on Carnot groups. Various applications to uniqueness, comparison of solutions and Liouville theorems are presented.
D’Ambrosio Lorenzo, Mitidieri Enzo
doaj   +1 more source

The Darboux problem for hyperbolic functional differential equations and inequalities in the sense of Carathéodory

open access: yes, 2010
We consider the linear and nonlinear problem for partial functional differential equations ∂ 2u ∂x∂y (x,y) = C(x,y)u(x,y)+P(x,y)u(x,y) a.e. in [0,a]× [0,b] ∂ 2u ∂x∂y (x,y) = f (x,y,u(x,y) ,u(x,y)) a.e.
A. Karpowicz
semanticscholar   +1 more source

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