Uniqueness and Stability of Nonnegative Solutions for Semipositone Problems in a Ball
Ismael Ali, Alfonso Castro, R. Shivaji · Proceedings of the American Mathematical Society · 1993
We study the uniqueness and stability of nonnegative solutions for classes of nonlinear elliptic Dirichlet problems on a ball, when the nonlinearity is monotone, negative at the origin, and either concave or convex.