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Multiple positive radial solutions for Neumann elliptic systems with gradient dependence
Filomena Cianciaruso, Gennaro Infante, Paolamaria Pietramala
Source abstract
We provide new results on the existence, nonexistence, and multiplicity of nonnegative radial solutions for semilinear elliptic systems with Neumann boundary conditions on an annulus. Our approach is topological and relies on the classical fixed‐point index. We present an example to illustrate our theory.
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