Results 11 to 20 of about 439,988 (279)

Some fixed point results of generalized $$(\phi , \psi )$$ ( ϕ , ψ ) -contractive mappings in ordered b-metric spaces

BMC Research Notes, 2020
Objectives The aim of this paper is to establish some fixed point, coincidence point and, coupled coincidence and coupled common fixed point results for generalized $$(\phi , \psi )$$ ( ϕ , ψ ) -contractive mappings in partially ordered b-metric spaces ...
Belay Mitiku, Kalyani Karusala, Seshagiri Rao Namana   +2 more
doaj   +1 more source

Note on KKM maps and applications

Fixed Point Theory and Applications, 2006
We apply the KKM technique to study fixed point theory, minimax inequality and coincidence theorem. Some new results on Fan-Browder fixed point theorem, Fan's minimax theorem and coincidence theorem are obtained.
B. S. Lee, J. K. Kim, Y. J. Cho, Y. Q. Chen   +3 more
doaj   +4 more sources

Fixed point results of $(\phi,\psi)$-weak contractions in ordered $b$-metric spaces

Cubo, 2022
The purpose of this paper is to prove some results on fixed point, coincidence point, coupled coincidence point and coupled common fixed point for the mappings satisfying generalized $(\phi, \psi)$-contraction conditions in complete partially ordered ...
N. Seshagiri Rao, K. Kalyani
doaj   +1 more source

Algebraic Coincidence Periods Of Self – Maps Of A Rational Exterior Space Of Rank 2

مجلة بغداد للعلوم, 2010
Let f and g be a self – maps of a rational exterior space . A natural number m is called a minimal coincidence period of maps f and g if f^m and g^m have a coincidence point which is not coincidence by any earlier iterates.
Baghdad Science Journal
doaj   +1 more source

Coincidence points in uniform spaces [PDF]

International Journal of Mathematics and Mathematical Sciences, 1992
Summary: We give a coincidence point theorem in sequentially complete Hausdorff uniform spaces. Our result reduces to a result of \textit{S. P. Acharya} [Yokohama Math. J. 22, 105-116 (1974; Zbl 0295.54058)].
T. Kubiak, Y. J. Cho
openaire   +3 more sources

Coincidence invariants and higher Reidemeister traces [PDF]

, 2015
The Lefschetz number and fixed point index can be thought of as two different descriptions of the same invariant. The Lefschetz number is algebraic and defined using homology.
Ponto, Kate
core   +1 more source

Some results on coincidence points [PDF]

Bulletin of the Australian Mathematical Society, 1999
In this paper we prove some coincidence point theorems for nonself single-valued and multivalued maps satisfying a nonexpansive condition. These extend fixed point theorems for multivalued maps of a number of authors.
Latif, Abdul, Tweddle, Ian
openaire   +2 more sources

Remarks on some coupled coincidence point results in partially ordered metric spaces

Arab Journal of Mathematical Sciences, 2014
In this paper we have used a method of reducing coupled coincidence and coupled fixed point results in partially ordered metric spaces to the respective results for mappings with one variable, even obtaining (in some cases) more general theorems.
Stojan Radenović
doaj   +1 more source

COINCIDENCE POINTS OF COMPATIBLE MULTIVALUED MAPPINGS

Demonstratio Mathematica, 1996
Let \(CB(X)\) be the space of nonempty bounded closed subsets of a metric space \((X,d)\) with the Hausdorff metric. Mappings \(T:X\to CB(X)\), \(f:X\to X\) are said to be compatible if, for any sequence \(\{x_n\}\subset X\) satisfying \(\lim_{n\to\infty} fx_n\in \lim_{n\to\infty} Tx_n\) we have \(\lim_{n\to\infty} H(fTx_n,Tfx_n)=0\).
Azam, Akbar, Beg, Ismat
openaire   +2 more sources

Coincidence summing correction methods and influence factors of γ spectrum

He jishu, 2022
BackgroundIn the radiation environmental quality measurement or emergency measurement, one of the factors that influence the measurement results of γ spectrum activity is the cascade coincidence summing effect of multienergy nuclides.PurposeThis study ...
ZHANG Lei
doaj   +1 more source