Results 111 to 120 of about 93,033 (295)

Symmetry breaking and semilinear elliptic equations

open access: yesJournal of Computational and Applied Mathematics, 1989
Symmetry breaking bifurcations (SBB's) are studied which occur on the radially symmetric solution branches of the semilinear elliptic equation \(\Delta u+\lambda f(u)=0\) on the unit ball in the space \(R^ 3\). A general theory is developed which permits a straightforward calculation of the SBB's.
openaire   +2 more sources

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  

Nonexistence of solutions to KPP-type equations of dimension greater than or equal to one

open access: yesElectronic Journal of Differential Equations, 2006
In this article, we consider a semilinear elliptic equations of the form $Delta u+f(u)=0$, where $f$ is a concave function. We prove for arbitrary dimensions that there is no solution bounded in $(0,1)$.
Janos Englander, Peter L. Simon
doaj  

Harnack inequality for non-divergence structure semi-linear elliptic equations

open access: yesAdvances in Nonlinear Analysis, 2018
In this paper we establish a Harnack inequality for non-negative solutions of L⁢u=f⁢(u){Lu=f(u)} where L is a non-divergence structure uniformly elliptic operator and f is a non-decreasing function that satisfies an appropriate growth conditions at ...
Mohammed Ahmed, Porru Giovanni
doaj   +1 more source

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