A unifying approach for some nonexpansiveness conditions on modular vector spaces

Autor: Andrea Bejenaru, Mihai Postolache
Jazyk: angličtina
Rok vydání: 2020
Předmět:
Zdroj: Nonlinear Analysis, Vol 25, Iss 5 (2020)
Druh dokumentu: article
ISSN: 1392-5113
2335-8963
DOI: 10.15388/namc.2020.25.18044
Popis: This paper provides a new, symmetric, nonexpansiveness condition to extend the classical Suzuki mappings. The newly introduced property is proved to be equivalent to condition (E) on Banach spaces, while it leads to an entirely new class of mappings when going to modular vector spaces; anyhow, it still provides an extension for the modular version of condition (C). In connection with the newly defined nonexpansiveness, some necessary and sufficient conditions for the existence of fixed points are stated and proved. They are based on Mann and Ishikawa iteration procedures, convenient uniform convexities and properly selected minimizing sequences.
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