0000000000607941

AUTHOR

A. Trombetta

showing 3 related works from this author

Eigenvectors of k-psi-contractive wedge operators

2008

We present new boundary conditions under which the fixed point index of a strict-$\psi$-contractive wedge operator is zero. Then we investigate eigenvalues and corresponding eigenvectors of k-$\psi$-contractive wedge operators.

Settore MAT/05 - Analisi MatematicaMeasure of noncompactness k-$\psi$-contractiove operator \sep $\psi$-condensing operator \sep wedge.
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A note on boundary conditions for nonlinear operators

2008

We investigate boundary conditions for strict-$\psi$-contractive and $\psi$-condensing operators. We derive results on the existence of eigenvectors with positive and negative eigenvalues and we obtain fixed point theorems for classes of noncompact opera\-tors.

Settore MAT/05 - Analisi MatematicaMeasure of noncompactness k-$\psi$-contraction $\psi$-condensing operator fixed point index.
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Eigenvectors of k–ψ-contractive wedge operators

AbstractWe present new boundary conditions under which the fixed point index of a strict-ψ-contractive wedge operator is zero. Then we investigate eigenvalues and corresponding eigenvectors of k–ψ-contractive wedge operators.

Radial setFixed point indexψ-condensing operatorMeasure of noncompactness k–ψ-contractive operatorWedgeRetractionApplied Mathematics Letters
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