Proves unique positive nondegenerate solution for the indefinite elliptic problem when p is close to 2, together with spectral properties and adapted Faber-Krahn type inequalities.
Multiple solutions to a semilinear elliptic equation with a sharp change of sign in the nonlinearity.J
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On the asymptotically linear problem for an elliptic equation with an indefinite nonlinearity
Proves unique positive nondegenerate solution for the indefinite elliptic problem when p is close to 2, together with spectral properties and adapted Faber-Krahn type inequalities.