Abstract
The existence of radial solutions of Δu + λg(|x|)f(u) = 0 in annuli with Dirichlet (Dirichlet/Neumann) boundary conditions is investigated. It is proved that the problems have at least two positive radial solutions on any annulus if f is superlinear at 0 and sublinear at ∞.
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More From: Applied Mathematics-A Journal of Chinese Universities
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