Continuum spectrum for the linearized extremal eigenvalue problem with boundary reactions
Futoshi Takahashi (2014)
Mathematica Bohemica
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We study the semilinear problem with the boundary reaction where , , is a smooth bounded domain, is a smooth, strictly positive, convex, increasing function which is superlinear at , and is a parameter. It is known that there exists an extremal parameter such that a classical minimal solution exists for , and there is no solution for . Moreover, there is a unique weak solution corresponding to the parameter . In this paper, we continue to study the spectral properties...