Results 41 to 50 of about 58,190 (204)
A Fixed Point Theorem Based on Miranda
Fixed Point Theory and Applications, 2007 A new fixed point theorem is proved by using the theorem of Miranda.
Uwe Schäfer
doaj +2 more sources
A fixed point theorem for multivalued mappings
Electronic Journal of Qualitative Theory of Differential Equations, 2004 A generalization of the Leray-Schauder principle for multivalued mappings is given. Using this result, an existence theorem for an integral inclusion is obtained.
C. Avramescu
doaj +1 more source
A Fixed Point Theorem for Manifolds [PDF]
Proceedings of the American Mathematical Society, 1971 A Lefschetz type fixed point theorem is proved extending a recent theorem by Robert F. Brown. It deals with compact maps of the form f : (
openaire +1 more source
A Generalization of Kannan's Fixed Point Theorem
Fixed Point Theory and Applications, 2009 In order to observe the condition of Kannan mappings, we prove a generalization of Kannan's fixed point theorem. Our theorem involves constants and we obtain the best constants to ensure a fixed point.
Yusuke Enjouji +2 more
doaj +1 more source
Fixed point theorems for set-valued contraction type maps in metric spaces
, 2010 We first give some fixed point results for set-valued self-map contractions in complete metric spaces. Then we derive a fixed point theorem for nonself set-valued contractions which are metrically inward. Our results generalize many well-known results in
Amini-Harandi, A, O'Regan, D
core +1 more source
ON THE SMARANDACHE FUNCTION AND THE FIXED - POINT THEORY OF NUMBERS [PDF]
, 1986 This brief note points out several basic connections between the Smarandache function, fixed-point theory and prime-number theory. First recall that fixed-point theory in function spaces provides elegent, if not short, proofs of the existence of ...
Mullin, Albert
core +1 more source
Operator type expansion-compression fixed point theorem
Electronic Journal of Differential Equations, 2011 This article presents an alternative to the compression and expansion fixed point theorems of functional type by using operators and functions to replace the functionals and constants that are used in functional compression and expansion fixed point ...
Douglas R. Anderson +3 more
doaj
Some generalizations of Kannan's fixed point theorem in K-metric spaces [PDF]
, 2012 We extend some known fixed point results for mappings satisfying Kannan type conditions to the context of K-metric spaces. Firstly, we prove a common fixed point result for noncommuting maps.
Lorenzo Ramírez, Josefa +2 more
core
Some variants of Wardowski fixed point theorem
Advances in Difference Equations, 2021 The purpose of this paper is to consider some F-contraction mappings in a dualistic partial metric space and to provide sufficient related conditions for the existence of a fixed point.
Muhammad Nazam +5 more
doaj +1 more source
FIXED POINT THEOREM FOR MULTIFUNCTIONS
Demonstratio Mathematica, 1984 This paper proves a fixed point theorem for multifunctions by the Ekeland variational principle. As an application a theorem of Lusternik is reobtained, but the argument seems not entirely correct. Using the author's notation, the following counterexample may be considered: \(X=Y\), \(H(x)=x\), \(u=x\), \(T=I\), \(x_ 0=0\). Then p is arbitrary positive,
openaire +2 more sources