Results 21 to 30 of about 2,649,766 (88)

Fixed point results for multivalued mappings of Ćirić type via F-contractions on quasi metric spaces

Open Mathematics, 2020
In this paper, we present some fixed point results for multivalued mappings with both closed values and proximinal values on left K-complete quasi metric spaces. We also provide a nontrivial example to illustrate our results.
Shatanawi Wasfi, Altun Ishak, Dağ Hacer
doaj   +1 more source

Fixed points and approximate fixed points in product spaces [PDF]

, 2001
The paper deals with the general theme of what is known about the existence of fixed points and approximate fixed points for mappings which satisfy geometric conditions in product spaces.
Espínola García, Rafael, Kirk, William Art   +1 more
core   +1 more source

Coupled coincidence point theorems for contractions without commutative condition in intuitionistic fuzzy normed spaces

, 2011
Recently, Gordji et al. [Math. Comput. Model. 54, 1897-1906 (2011)] prove the coupled coincidence point theorems for nonlinear contraction mappings satisfying commutative condition in intuitionistic fuzzy normed spaces.
W. Sintunavarat, Y. Cho, Poom Kumam
semanticscholar   +1 more source

A note on complementarity problem

International Journal of Mathematics and Mathematical Sciences, Volume 21, Issue 3, Page 621-623, 1998., 1998
In this paper we prove a result of complementarity problem where compact condition is somewhat relaxed.
Antonio Carbone
wiley   +1 more source

Some results on invariant approximation

International Journal of Mathematics and Mathematical Sciences, Volume 17, Issue 3, Page 483-487, 1994., 1993
In this paper results on Invariant approximations, extending and unifying earlier results are given. Several interesting results are derived as corollaries.
Antonio Carbone
wiley   +1 more source

Coupled and tripled coincidence point results without compatibility

, 2012
In this article, we introduce a new and simple approach to coupled and tripled coincidence point theory. By using our method, we establish coupled coincidence point results of Lakshmikantham and Ćirić, Binayak et al., Alotaibi and Alsulami without any ...
N. Hussain, A. Latif, Masood Hussain Shah   +2 more
semanticscholar   +1 more source

Topological Transversality Principles and General Coincidence Theory

Analele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2017
This paper presents general topological coincidence principles for multivalued maps defined on subsets of completely regular topological spaces.
O’Regan Donal
doaj   +1 more source

On some fixed point theorems

International Journal of Mathematics and Mathematical Sciences, Volume 12, Issue 1, Page 61-64, 1989., 1987
In this paper we prove a fixed point theorem for inward mappings uing a well‐known result of Ky Fan type in Hilbert space setting.
D. Roux, S. P. Singh
wiley   +1 more source

Local expansions and accretive mappings

International Journal of Mathematics and Mathematical Sciences, Volume 6, Issue 3, Page 419-429, 1983., 1983
Let X and Y be complete metric spaces with Y metrically convex, let D ⊂ X be open, fix u0 ∈ X, and let d(u) = d(u0, u) for all u ∈ D. Let f : X → 2Y be a closed mapping which maps open subsets of D onto open sets in Y, and suppose f is locally expansive on D in the sense that there exists a continuous nonincreasing function c : R+ → R+ with ∫+∞c(s)ds =
W. A. Kirk
wiley   +1 more source

A fixed point theorem for contraction mappings

International Journal of Mathematics and Mathematical Sciences, Volume 5, Issue 2, Page 301-304, 1982., 1981
Let S be a closed subset of a Banach space E and f : S → E be a strict contraction mapping. Suppose there exists a mapping h : S → (0, 1] such that (1 − h(x))x + h(x)f(x) ∈ S for each x ∈ S. Then for any x0 ∈ S, the sequence {xn} in S defined by xn+1 = (1 − h(xn))xn + h(xn)f(xn), n ≥ 0, converges to a u ∈ S. Further, if ∑h(xn) = ∞, then f(u) = u.
V. M. Sehgal
wiley   +1 more source