Results 91 to 100 of about 16,726 (202)

Existence and multiplicity of solutions for semilinear elliptic equations with Neumann boundary conditions

Electronic Journal of Differential Equations, 2015
This article shows the existence of solutions by the least action principle, for semilinear elliptic equations with Neumann boundary conditions, under critical growth and local coercive conditions.
Qin Jiang, Sheng Ma
doaj  

Concentration and dynamic system of solutions for semilinear elliptic equations

Electronic Journal of Differential Equations, 2003
In this article, we use the concentration of solutions of the semilinear elliptic equations in axially symmetric bounded domains to prove that the equation has three positive solutions. One solution is y-symmetric and the other are non-axially symmetric.
Tsung-fang Wu
doaj  

Bifurcation of Gradient Mappings Possessing the Palais-Smale Condition

International Journal of Mathematics and Mathematical Sciences, 2011
This paper considers bifurcation at the principal eigenvalue of a class of gradient operators which possess the Palais-Smale condition. The existence of the bifurcation branch and the asymptotic nature of the bifurcation is verified by using the ...
Elliot Tonkes
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Oscillation criteria for semilinear elliptic equations with a damping term in R^n

Electronic Journal of Differential Equations, 2010
We use a method based on Picone-type identities to find oscillation conditions for the equation $$ sum_{i j =1}^n frac{partial}{partial x_i} Big( a_{ij}(x) frac{partial}{partial x_j} Big)u + f(x,u, abla u) + c(x) u =0,, $$ with Dirichlet boundary ...
Tadie
doaj  

Structure Results for Semilinear Elliptic Equations with Hardy Potentials

Advanced Nonlinear Studies, 2018
We prove structure results for the radial solutions of the semilinear ...
Franca Matteo, Garrione Maurizio
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Comparison results for semilinear elliptic equations via Picone-type identities

Electronic Journal of Differential Equations, 2009
By means of a Picone's type identity, we prove uniqueness and oscillation of solutions to an elliptic semilinear equation with Dirichlet boundary conditions.
Tadie
doaj  

A singular perturbation result for a class of periodic-parabolic BVPs

Open Mathematics
In this article, we obtain a very sharp version of some singular perturbation results going back to Dancer and Hess [Behaviour of a semilinear periodic-parabolic problem when a parameter is small, Lecture Notes in Mathematics, Vol. 1450, Springer-Verlag,
Cano-Casanova Santiago, Fernández-Rincón Sergio, López-Gómez Julián   +2 more
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The Dirichlet problem for the Poisson type equations in the plane

Доповiдi Нацiональної академiї наук України
We present a new approach to the study of semilinear equations of the form div [A(z)∇u] = f (u), the diffusion term of which is the divergence uniform elliptic operator with measurable matrix functions A(z), whereas its reaction term f (u) is a ...
V.Ya. Gutlyanskiĭ, O.V. Nesmelova, V.I. Ryazanov   +2 more
doaj   +1 more source

Inverse eigenvalue problems for semilinear elliptic equations

Electronic Journal of Differential Equations, 2009
We consider the inverse nonlinear eigenvalue problem for the equation $$displaylines{ -Delta u + f(u) = lambda u, quad u > 0 quad hbox{in } Omega,cr u = 0 quad hbox{on } partialOmega, } where $f(u)$ is an unknown nonlinear term, $Omega subset ...
Tetsutaro Shibata
doaj  

Tracking and blind deconvolution of blood alcohol concentration from transdermal alcohol biosensor data: A population model-based LQG approach in Hilbert space. [PDF]

Automatica (Oxf), 2023
Yao M, Luczak SE, Rosen IG.
europepmc   +1 more source