Results 61 to 70 of about 582,695 (345)

Employing Locally Finitely T-Transitive Binary Relations to Prove Coincidence Theorems for Nonlinear Contractions

open access: yesJournal of Function Spaces, 2020
In this article, we prove some relation-theoretic results on coincidence and common fixed point for a nonlinear contraction employing a locally finitely T-transitive binary relation, where T stands for a self-mapping on the underlying metric space.
Mohammad Arif   +3 more
doaj   +1 more source

Transition competence as an indicator of health outcomes related to transition

open access: yesChild: Care, Health and Development, 2023
AbstractBackgroundAdolescents and young adults (AYAs) with chronic conditions face a transfer, defined as an actual shift from paediatric to adult‐oriented health care. Transition competence as the self‐perceived knowledge, skills and abilities regarding the transition process was considered extremely useful.AimThis study was designed to investigate ...
Henriette Markwart   +4 more
openaire   +2 more sources

Relation-preserving generalized nonlinear contractions and related fixed point theorems

open access: yesAIMS Mathematics, 2022
In this paper, we present some fixed point theorems for generalized nonlinear contractions involving a new pair of auxiliary functions in a metric space endowed with a locally finitely T-transitive binary relation.
Faruk Sk   +3 more
doaj   +1 more source

Groups in Which Commutativity Is a Transitive Relation

open access: bronzeJournal of Algebra, 1998
AbstractWe investigate the structure of groups in which commutativity is a transitive relation on non-identity elements (CT-groups). A detailed study of locally finite, polycyclic, and torsion-free solvableCT-groups is carried out. Other topics include fixed-point-free groups of automorphisms of abelian torsion groups and their cohomology groups.
Yu-Fen Wu
openalex   +3 more sources

Matroidal structure of generalized rough sets based on symmetric and transitive relations [PDF]

open access: yes, 2012
Rough sets are efficient for data pre-process in data mining. Lower and upper approximations are two core concepts of rough sets. This paper studies generalized rough sets based on symmetric and transitive relations from the operator-oriented view by ...
Yang, Bin, Zhu, William
core  

K-causality coincides with stable causality

open access: yes, 2008
It is proven that K-causality coincides with stable causality, and that in a K-causal spacetime the relation K^+ coincides with the Seifert's relation. As a consequence the causal relation "the spacetime is strongly causal and the closure of the causal ...
Minguzzi, E.
core   +2 more sources

Upper Semicontinuous Extensions of Binary Relations [PDF]

open access: yes, 2002
Suzumura shows that a binary relation has a weak order extension if and only if it is consistent. However, consistency is demonstrably not sufficient to extend an upper semi-continuous binary relation to an upper semicontinuous weak order. Jaffray proves
Bossert, Walter   +2 more
core   +3 more sources

Self‐Assembly Engineering of Fullerene‐Like Polyhedra: V60, V66, V72 From {MV5} Pentagonal Second Building Block

open access: yesAdvanced Science, EarlyView.
A precise self‐assembly of fullerene‐like V60‐MOP constructed from the first discovered polyoxovanadates five‐membered ring V5 units is discovered. In situ modifications are successfully used to insert {MO5} (M = V/Mo) in the center of the V5 ring, resulting in three other isomorphic spherical cages V66‐MOP, V72‐MOP, and V60Mo12‐MOP.
Hongmei Gan   +5 more
wiley   +1 more source

Optimal pair of fixed points for a new class of noncyclic mappings under a $ (\varphi, \mathcal{R}^t) $-enriched contraction condition

open access: yesElectronic Research Archive
In the present study, we commenced by presenting a new class of maps, termed noncyclic $ (\varphi, \mathcal{R}^t) $-enriched quasi-contractions within metric spaces equipped with a transitive relation $ \mathcal{R}^t $.
A. Safari-Hafshejani   +2 more
doaj   +1 more source

The combinational structure of non-homogeneous Markov chains with countable states

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1983
Let P(s,t) denote a non-homogeneous continuous parameter Markov chain with countable state space E and parameter space [a,b], −∞
A. Mukherjea, A. Nakassis
doaj   +1 more source

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