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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.