A fixed point theorem for directional multi-valued k(.)-contractions acting m a complete metric space is established which extends similar results both for k(.)-contractions and directional contractions. Such theorem enables to obtain fixed points theorems for the former class of set-valued maps from those valid for the latter one without metrical convexity or proximinality assumptions, thereby contributing to unify the current setting of the theory. Connections with several recent advances on this subject are also examinated.

Uderzo, A. (2005). Fixed points for directional multi-valued k(.)-contractions. JOURNAL OF GLOBAL OPTIMIZATION, 31(3), 455-469 [10.1007/s10898-004-0571-z].

Fixed points for directional multi-valued k(.)-contractions

UDERZO, AMOS
2005

Abstract

A fixed point theorem for directional multi-valued k(.)-contractions acting m a complete metric space is established which extends similar results both for k(.)-contractions and directional contractions. Such theorem enables to obtain fixed points theorems for the former class of set-valued maps from those valid for the latter one without metrical convexity or proximinality assumptions, thereby contributing to unify the current setting of the theory. Connections with several recent advances on this subject are also examinated.
Articolo in rivista - Articolo scientifico
directional multi-valued k(.)-contraction; displacement function; Ekeland variational principle; fixed point
English
2005
31
3
455
469
none
Uderzo, A. (2005). Fixed points for directional multi-valued k(.)-contractions. JOURNAL OF GLOBAL OPTIMIZATION, 31(3), 455-469 [10.1007/s10898-004-0571-z].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/1270
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