1,496 research outputs found
Fixed Point Theorems for Set-Valued Mappings on TVS-Cone Metric Spaces
In the context of tvs-cone metric spaces, we prove a Bishop-Phelps and a
Caristi's type theorem. These results allow us to prove a fixed point theorem
for -weak contraction according to a pseudo Hausdorff metric
defined by means of a cone metric
Dynamic Processes, Fixed Points, Endpoints, Asymmetric Structures, and Investigations Related to Caristi, Nadler, and Banach in Uniform Spaces
Research ArticleIn uniform spaces (...) with symmetric structures determined by the D-families of pseudometrics which define uniformity in
these spaces, the new symmetric and asymmetric structures determined by the J-families of generalized pseudodistances on (...) are constructed; using these structures the set-valued contractions of two kinds of Nadler type are defined and the new and general
theorems concerning the existence of fixed points and endpoints for such contractions are proved. Moreover, using these new
structures, the single-valued contractions of two kinds of Banach type are defined and the new and general versions of the Banach
uniqueness and iterate approximation of fixed point theorem for uniform spaces are established. Contractions defined and studied
here are not necessarily continuous. One of the main key ideas in this paper is the application of our fixed point and endpoint
version of Caristi type theorem for dissipative set-valued dynamic systems without lower semicontinuous entropies in uniform
spaces with structures determined by J-families. Results are new also in locally convex and metric spaces. Examples are provided
A unified theory of cone metric spaces and its applications to the fixed point theory
In this paper we develop a unified theory for cone metric spaces over a solid
vector space. As an application of the new theory we present full statements of
the iterated contraction principle and the Banach contraction principle in cone
metric spaces over a solid vector space.Comment: 51 page
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