On boundary conditions for wedge operators on radial sets
- Autori: CAPONETTI D; TROMBETTA A; TROMBETTA G
- Anno di pubblicazione: 2008
- Tipologia: Articolo in rivista (Articolo in rivista)
- Parole Chiave: Measure of noncompactness, k-$\psi$-contraction, wedge, relative fixed point index, radial set.
- OA Link: http://hdl.handle.net/10447/40011
Abstract
We present a theorem about calculation of fixed point index for k-$\psi$-contractive operators with 0 < k <1 defined on a radial set of a wedge of an infinite dimensional Banach space. Then results on the existence of eigenvectors and nonzero fixed points are obtained.