177 research outputs found
Iterative methods for approximating fixed points of Bregman nonexpansive operators
Diverse notions of nonexpansive type operators have been extended to the
more general framework of Bregman distances in reflexive Banach spaces. We study these classes of operators, mainly with respect to the existence and approximation of their (asymptotic) fixed points. In particular, the asymptotic behavior of Picard and Mann type iterations is discussed for quasi-Bregman nonexpansive operators. We also present parallel algorithms for approximating common fixed points of a finite family of Bregman strongly nonexpansive operators by means of a block operator which preserves the Bregman strong nonexpansivity. All the results hold, in particular, for the smaller class of Bregman firmly nonexpansive operators, a class which contains the generalized resolvents of monotone mappings with respect to the Bregman distance.Dirección General de Enseñanza SuperiorJunta de AndalucÃaIsrael Science FoundationGraduate School of the TechnionFund for the Promotion of Research at the TechnionTechnion President’s Research Fun
Approximating fixed point of({\lambda},{\rho})-firmly nonexpansive mappings in modular function spaces
In this paper, we first introduce an iterative process in modular function
spaces and then extend the idea of a {\lambda}-firmly nonexpansive mapping from
Banach spaces to modular function spaces. We call such mappings as
({\lambda},{\rho})-firmly nonexpansive mappings. We incorporate the two ideas
to approximate fixed points of ({\lambda},{\rho})-firmly nonexpansive mappings
using the above mentioned iterative process in modular function spaces. We give
an example to validate our results
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