Results 11 to 20 of about 474,338 (128)

Forced Oscillations of Half-Linear Elliptic Equations via Picone-Type Inequality [PDF]

open access: yesInternational Journal of Differential Equations, 2010
Picone-type inequality is established for a class of half-linear elliptic equations with forcing term, and oscillation results are derived on the basis of the Picone-type inequality. Our approach is to reduce the multi-dimensional oscillation problems to
Norio Yoshida
doaj   +3 more sources

Sturm comparison theorems via Picone-type inequalities for some nonlinear elliptic type equations with damped terms [PDF]

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2014
In this paper, we establish a Picone-type inequality for a class of some nonlinear elliptic type equations with damped terms, and obtain Sturmian comparison theorems using the Picone-type inequality.
Aydin Tiryaki, Sinem Sahiner
doaj   +3 more sources

Picone-type inequality and Sturmian comparison theorems for quasilinear elliptic operators with p(x)-Laplacians [PDF]

open access: yesElectronic Journal of Differential Equations, 2012
A Picone-type inequality for quasilinear elliptic operators with mixed nonlinearities and with p(x)-Laplacian is established, and Sturmian comparison theorems are derived on the basis of the Picone-type inequality.
Norio Yoshida
doaj   +2 more sources

Sturm-Picone type theorems for nonlinear differential systems

open access: yesElectronic Journal of Differential Equations, 2015
In this article, we establish a Picone-type inequality for a pair of first-order nonlinear differential systems. By using this inequality, we give Sturm-Picone type comparison theorems for these systems and a special class of second-order half-linear ...
Aydin Tiryaki
doaj   +1 more source

30 Years of space–time covariance functions

open access: yesWIREs Computational Statistics, Volume 13, Issue 2, March/April 2021., 2021
A separable covariance function (left) and a space‐time covariance function with dynamical compact support. Abstract In this article, we provide a comprehensive review of space–time covariance functions. As for the spatial domain, we focus on either the d‐dimensional Euclidean space or on the unit d‐dimensional sphere.
Emilio Porcu   +2 more
wiley   +1 more source

Caccioppoli-type inequalities for Dirac operators

open access: yesJournal of Inequalities and Applications, 2022
In this paper, we establish the Caccioppoli estimates for the nonlinear differential equation − D ‾ ( | D v | p − 2 D v ) = λ | v | p − 2 v , 1 < p < ∞ , $$ - \overline{D}\bigl( \vert Dv \vert ^{p-2}Dv\bigr) = \lambda \vert v \vert ^{p-2}v, \quad 1< p ...
Ardak Kashkynbayev, Gulaiym Oralsyn
doaj   +1 more source

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

A generalized nonlinear Picone identity for the p-biharmonic operator and its applications

open access: yesJournal of Inequalities and Applications, 2019
A generalized nonlinear Picone identity for the p-biharmonic operator is established in this paper. As applications, a Sturmian comparison principle to the p-biharmonic equation with singular term, a Liouville’s theorem to the p-biharmonic system, and a ...
Tingfu Feng
doaj   +1 more source

An efficient numerical model for the simulation of coupled heat, air, and moisture transfer in porous media

open access: yesEngineering Reports, Volume 2, Issue 2, February 2020., 2020
An efficient explicit numerical model is proposed for the simulation of heat, air, and moisture transfer in porous material. The combination of innovative approaches enables to relax the numerical stability condition to reduce the computational time. Abstract This article proposes an efficient explicit numerical model with a relaxed stability condition
Julien Berger   +3 more
wiley   +1 more source

Weak Comparison Principle for Weighted Fractional p‐Laplacian Equation

open access: yesJournal of Function Spaces, Volume 2020, Issue 1, 2020., 2020
The aim of this paper is to establish a weak comparison principle for a class fractional p‐Laplacian equation with weight. The nonlinear term f(x, s) > 0 is a Carathéodory function which is possibly unbounded both at the origin and at infinity and such that f(x, s)s1−p decreases with respect to s for a.e. x ∈ Ω.
Jin Xie, Jiabin Zuo
wiley   +1 more source

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