Results 41 to 50 of about 1,686 (103)

Existence of entire explosive positive radial solutions of quasilinear elliptic systems

open access: yesInternational Journal of Mathematics and Mathematical Sciences, Volume 2003, Issue 46, Page 2907-2927, 2003., 2003
Our main purpose is to establish that entire explosive positive radial solutions exist for quasilinear elliptic systems. The main results of the present paper are new and extend previous results.
Yang Zuodong
wiley   +1 more source

On Principle Eigenvalue for Linear Second Order Elliptic Equations in Divergence Form [PDF]

open access: yes, 2003
2002 Mathematics Subject Classification: 35J15, 35J25, 35B05, 35B50The principle eigenvalue and the maximum principle for second-order elliptic equations is studied.
Fabricant, A., Kutev, N., Rangelov, T.
core  

Landesman-Lazer condition revisited: the influence of vanishing and oscillating nonlinearities [PDF]

open access: yes, 2015
In this paper we deal with semilinear problems at resonance. We present a sufficient condition for the existence of a weak solution in terms of the asymptotic properties of nonlinearity.
Drabek, Pavel, Langerova, Martina
core   +3 more sources

On the continuity of principal eigenvalues for boundary value problems with indefinite weight function with respect to radius of balls in ℝN

open access: yesInternational Journal of Mathematics and Mathematical Sciences, Volume 29, Issue 5, Page 279-283, 2002., 2002
We investigate the continuity of principal eigenvalues (i.e., eigenvalues corresponding to positive eigenfunctions) for the boundary value problem −Δu(x) = λg(x)u(x), x ∈ BR(0); u(x) = 0, |x| = R, where BR(0) is a ball in ℝN, and g is a smooth function, and we show that λ1+(R) and λ1−(R) are continuous functions of R.
Ghasem Alizadeh Afrouzi
wiley   +1 more source

Hopf's lemma for a class of singular/degenerate PDE-s

open access: yes, 2014
This paper concerns Hopf's boundary point lemma, in certain $C^{1,Dini}$-type domains, for a class of singular/degenerate PDE-s, including $p$-Laplacian.
Mikayelyan, Hayk, Shahgholian, Henrik
core   +1 more source

Symmetry breaking for a problem in optimal insulation [PDF]

open access: yes, 2016
We consider the problem of optimally insulating a given domain $\Omega$ of ${\mathbb{R}}^d$; this amounts to solve a nonlinear variational problem, where the optimal thickness of the insulator is obtained as the boundary trace of the solution.
Bucur, Dorin   +2 more
core   +2 more sources

Elliptic problems with nonmonotone discontinuities at resonance (Erratum)

open access: yes, 2004
Abstract and Applied Analysis, Volume 2004, Issue 3, Page 269-270, 2004.
Halidias Nikolaos
wiley   +1 more source

Boundedness and monotonicity of principal eigenvalues for boundary value problems with indefinite weight functions

open access: yesInternational Journal of Mathematics and Mathematical Sciences, Volume 30, Issue 1, Page 25-29, 2002., 2002
We study the principal eigenvalues (i.e., eigenvalues corresponding to positive eigenfunctions) for the boundary value problem: −Δu(x) = λg(x)u(x), x ∈ D; (∂u/∂n)(x) + αu(x) = 0, x ∈ ∂D, where Δ is the standard Laplace operator, D is a bounded domain with smooth boundary, g : D → ℝ is a smooth function which changes sign on D and α ∈ ℝ.
G. A. Afrouzi
wiley   +1 more source

Refined second boundary behavior of the unique strictly convex solution to a singular Monge-Ampère equation

open access: yesAdvances in Nonlinear Analysis, 2021
In this paper, we establish the second boundary behavior of the unique strictly convex solution to a singular Dirichlet problem for the Monge-Ampère ...
Wan Haitao, Shi Yongxiu, Liu Wei
doaj   +1 more source

Some nonlinear second order equation modelling rocket motion [PDF]

open access: yes, 2015
In this paper, we consider a nonlinear second order equation modelling rocket motion in the gravitational field obstructed by the drag force.
Bors, Dorota, Stańczy, Robert
core  

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