Results 11 to 20 of about 578,070 (245)

Point-valued mappings of sets

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1995
Let X be a metric space and let CB(X) denote the closed bounded subsets of X with the Hausdorff metric. Given a complete subspace Y of CB(X), two fixed point theorems, analogues of results in [1], are proved, and examples are given to suggest their ...
Matt Insall
doaj   +1 more source

Random fixed point theorems under mild continuity assumptions [PDF]

open access: yes, 2013
In this paper, we study the existence of the random fixed points under mild continuity assumptions. The main theorems consider the almost lower semicontinuous operators defined on Frechet spaces and also operators having properties weaker than lower ...
Patriche, Monica
core   +2 more sources

New common fixed point theorems for multivalued maps

open access: yesApplied General Topology, 2014
Common fixed point theorems for a new class of multivalued maps are obtained, which generalize and extend classical fixed point theorems of Nadler and Reich and some recent Suzuki type fixed point theorems.
S. L. Singh   +3 more
doaj   +1 more source

On a Fixed Point Theorem of Kirk [PDF]

open access: yesProceedings of the American Mathematical Society, 1995
Let X be a reflexive Banach space, D an open and bounded subset of X, and T : D ¯ → X T:\bar D \to X a continuous mapping which is locally pseudocontractive on D.
Claudio H. Morales, Simba A. Mutangadura
openaire   +1 more source

Near Fixed Point Theorems in Hyperspaces

open access: yesMathematics, 2018
The hyperspace consists of all the subsets of a vector space. It is well-known that the hyperspace is not a vector space because it lacks the concept of inverse element. This also says that we cannot consider its normed structure, and some kinds of fixed
Hsien-Chung Wu
doaj   +1 more source

A uniqueness theorem for fixed points [PDF]

open access: yesProceedings of the American Mathematical Society, 1980
In a recent paper, R. Kellogg [3] showed that if F : D ¯ → D ¯ F:\bar D \to \bar D is a completely continuous map of the closure of a bounded, convex, open set D in a real Banach space X, F
Charles Alexander Stuart, H. L. Smith
openaire   +3 more sources

Generalized Caristi's Fixed Point Theorems

open access: yesFixed Point Theory and Applications, 2009
We present generalized versions of Caristi's fixed point theorem for multivalued maps. Our results either improve or generalize the corresponding generalized Caristi's fixed point theorems due to Bae (2003), Suzuki (2005), Khamsi (2008), and ...
Abdul Latif
doaj   +1 more source

Some Fixed Point Theorems in Fuzzy n-Normed Spaces [PDF]

open access: yes, 2010
The main purpose of this paper is to study the existence of a fixed points in fuzzy n-normed spaces. we proved our main results, a fixed point theorem for a self mapping and a common fixed point theorem for a pair of weakly compatible mappings on fuzzy n-
Elagan, Sayed Khalil   +1 more
core   +1 more source

Remarks on Recent Fixed Point Theorems

open access: yesFixed Point Theory and Applications, 2010
Coincidence and fixed point theorems for a new class of contractive, nonexpansive and hybrid contractions are proved. Applications regarding the existence of common solutions of certain functional equations are also discussed.
Mishra SN, Singh SL
doaj   +2 more sources

Fixed Point Theorems for Multivalued Mappings Involving α-Function

open access: yesAbstract and Applied Analysis, 2014
We obtain some fixed point theorems with error estimates for multivalued mappings satisfying a new α-ψ-contractive type condition. Our theorems generalize many existing fixed point theorems, including some fixed point theorems proved for α-ψ-contractive ...
Muhammad Usman Ali   +2 more
doaj   +1 more source

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