Convergence Theorem for a Family of Generalized Asymptotically Nonexpansive Semigroup in Banach Spaces

oleh: Bashir Ali, G. C. Ugwunnadi

Format: Article
Diterbitkan: Hindawi Limited 2012-01-01

Deskripsi

Let 𝐸 be a real reflexive and strictly convex Banach space with a uniformly GΓ’teaux differentiable norm. Let 𝔍={𝑇(𝑑)βˆΆπ‘‘β‰₯0} be a family of uniformly asymptotically regular generalized asymptotically nonexpansive semigroup of 𝐸, with functions 𝑒,π‘£βˆΆ[0,∞)β†’[0,∞). Let 𝐹∢=𝐹(𝔍)=βˆ©π‘‘β‰₯0𝐹(𝑇(𝑑))β‰ βˆ… and π‘“βˆΆπΎβ†’πΎ be a weakly contractive map. For some positive real numbers πœ† and 𝛿 satisfying 𝛿+πœ†>1, let πΊβˆΆπΈβ†’πΈ be a 𝛿-strongly accretive and πœ†-strictly pseudocontractive map. Let {𝑑𝑛} be an increasing sequence in [0,∞) with limπ‘›β†’βˆžπ‘‘π‘›=∞, and let {𝛼𝑛} and {𝛽𝑛} be sequences in (0,1] satisfying some conditions. Strong convergence of a viscosity iterative sequence to common fixed points of the family 𝔍 of uniformly asymptotically regular asymptotically nonexpansive semigroup, which also solves the variational inequality ⟨(πΊβˆ’π›Ύπ‘“)𝑝,𝑗(π‘βˆ’π‘₯)βŸ©β‰€0, for all π‘₯∈𝐹, is proved in a framework of a real Banach space.