Results 101 to 110 of about 75,181 (273)

Solutions to nonlinear elliptic equations with a nonlocal boundary condition

open access: yesElectronic Journal of Differential Equations, 2002
We study an elliptic equation and its evolution problem on a bounded domain with nonlocal boundary conditions. Eigenvalue problems, existence, and dynamic behavior of solutions for linear and semilinear equations are investigated.
Yuandi Wang
doaj  

Computation of radial solutions of semilinear equations

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2007
We express radial solutions of semilinear elliptic equations on $R^n$ as convergent power series in $r$, and then use Pade approximants to compute both ground state solutions, and solutions to Dirichlet problem.
Philip Korman
doaj   +1 more source

Some maximum principles in semilinear elliptic equations [PDF]

open access: yesProceedings of the American Mathematical Society, 1986
We develop maximum principles for functions defined on the solutions to a class of semilinear, second order, uniformly elliptic partial differential equations. These principles are related to recent theorems of Protter and Protter and Weinberger and to a technique initiated by Payne for the determination of gradient bounds on the solution of the ...
openaire   +2 more sources

On the solution stability of parabolic optimal control problems. [PDF]

open access: yesComput Optim Appl, 2023
Corella AD, Jork N, Veliov VM.
europepmc   +1 more source

Multiplicity of Nontrivial Solutions of Semilinear Elliptic Equations

open access: yesJournal of Mathematical Analysis and Applications, 2000
It is considered the following problem: \(-\Delta u = f(x,u)\) in \(\Omega\), \(u=0\) on \(\partial\Omega\), where \(f\) is a subcritical Carathéodory function. It is proved the existence of at least two nontrivial solutions. This paper unifies and generalizes some results from \textit{A. Castro} and \textit{A. C. Lazer} [Ann. Mat. Pura Appl., IV. Ser.
Chun-Lei Tang   +2 more
openaire   +3 more sources

Oscillation criteria for semilinear elliptic equations with a damping term in R^n

open access: yesElectronic 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  

Comparison results for semilinear elliptic equations via Picone-type identities

open access: yesElectronic 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  

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