Results 291 to 300 of about 2,884,547 (321)

Common Fixed Points of Nonlinear Contractions

Acta Mathematica Hungarica, 1998
In der vorliegenden Arbeit werden Paare von Selbstabbildungen eines vollständigen metrischen Raumes betrachtet und hinreichende Bedingungen vom Kontraktionstyp angegeben, die die Existenz und Unität eines gemeinsamen Fixpunktes sichern. Ist \(\Phi\) die Menge aller Funktionen \(\varphi:[0,\infty)\to[0,\infty)\), die rechtsseitig stetig sowie nicht ...
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Common supports as fixed points

Geometriae Dedicata, 1996
A family \({\mathcal S}\) of subsets of \(\mathbb{R}^d\) is called by the authors sundered if, for any way of choosing a point from \(r (\leq d + 1)\) members of \({\mathcal S}\), the chosen \(r\) points are affinely independent. The authors mention that this is equivalent to being \((d - 1)\)-separated as defined by \textit{S. Cappell}, \textit{J.
Lewis, Ted, von Hohenbalken, Balder, Klee, Victor   +2 more
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Split common fixed point and common null point problem

Mathematical Methods in the Applied Sciences, 2017
In this paper, we present a new algorithm for solving the split common null point and common fixed point problem, to find a point that belongs to the common element of common zero points of an infinite family of maximal monotone operators and common fixed points of an infinite family of demicontractive mappings such that its image under a linear ...
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A Common Fixed Point Theorem with Applications

Journal of Optimization Theory and Applications, 2013
Let \(X\) be a nonempty compact convex subset of a locally convex Hausdorff topological vector space. The main result is that a family \(\{T_i: X\rightrightarrows X\}_{i\in I}\) of closed set-valued mappings with nonempty convex values has a common fixed point if, for each nonempty finite subset \(J\) of the index set \(I\), the mapping \(S_J: X ...
Agarwal, R. P., Balaj, M., O'Regan, D.
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A question on common fixed points

1999
The authors give a partial answer to the following problem: Let \(X\) be a compact space with the fixed point property and \({\mathcal F}\) a family of continuous mappings from \(X\) to \(X\) such that \(|{\mathcal F}|\geq{\mathfrak c}\). In which conditions on \({\mathcal F}\) and \(X\) there is a subfamily \({\mathcal F}_0\subset{\mathcal F}\) of ...
CAMMAROTO, Filippo, MATVEEV M. V.
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Common Fixed Points of Pairwise Commuting Mappings

Mathematische Nachrichten, 1984
The author proves the following theorem: Let (X,d) be a complete 2-metric space with d continuous and let S,T: \(X\to X\) be a pair of continuous mappings. Then S and T have a common fixed point in X if and only if there exist mappings \(A,B: X\to SX\cap TX\) such that \(AS=SA\), \(BT=TB\) satisfying \[ (1)\quad d(Ax,By,a)\leq c \max \{d(Sx,Ty,a),\quad
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Common Fixed Points of Commuting Monotone Mappings

Canadian Journal of Mathematics, 1967
We are concerned here with the existence of fixed or common fixed points of commuting monotone self-mappings of a partially ordered set into itself. Let X be a partially ordered set. A self-mapping ƒ of X into itself is called an isotone mapping if x ⩾ y implies ƒ(x) ⩾ ƒ(y).
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Colorectal cancer statistics, 2023

Ca-A Cancer Journal for Clinicians, 2023
Rebecca L Siegel, Nikita Sandeep Wagle, Robert A Smith   +2 more
exaly  

Current treatment and recent progress in gastric cancer

Ca-A Cancer Journal for Clinicians, 2021
Smita S Joshi, Brian D Badgwell
exaly  

Colorectal cancer statistics, 2020

Ca-A Cancer Journal for Clinicians, 2020
Rebecca L Siegel, Kimberly D Miller, Stacey A Fedewa   +2 more
exaly