Search results for "Matematica"

showing 10 items of 1637 documents

Common fixed points of mappings satisfying implicit relations in partial metric spaces

2013

Matthews, [S. G. Matthews, Partial metric topology, in: Proc. 8th Summer Conference on General Topology and Applications, in: Ann. New York Acad. Sci., vol. 728, 1994, pp. 183-197], introduced and studied the concept of partial metric space, as a part of the study of denotational semantics of dataflow networks. He also obtained a Banach type fixed point theorem on complete partial metric spaces. Very recently Berinde and Vetro, [V. Berinde, F. Vetro, Common fixed points of mappings satisfying implicit contractive conditions, Fixed Point Theory and Applications 2012, 2012:105], discussed, in the setting of metric and ordered metric spaces, coincidence point and common fixed point theorems fo…

Pure mathematicsAlgebra and Number TheoryDataflowCoincidence point common fixed point contraction implicit relation partial metric space.Fixed-point theoremFixed pointMetric spaceDenotational semanticsSettore MAT/05 - Analisi MatematicaCommon fixed pointGeneral topologyCoincidence pointAnalysisMathematicsJournal of Nonlinear Sciences and Applications
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A note on homoclinic solutions of (p,q)-Laplacian difference equations

2019

We prove the existence of at least two positive homoclinic solutions for a discrete boundary value problem of equations driven by the (p,q) -Laplace operator. The properties of the nonlinearity ensure that the energy functional, corresponding to the problem, satisfies a mountain pass geometry and a Palais–Smale compactness condition.

Pure mathematicsAlgebra and Number TheoryDifference equationApplied MathematicsOperator (physics)010102 general mathematicshomoclinic solution01 natural sciences010101 applied mathematicsNonlinear system(pq)-Laplace operatorpositive solutionSettore MAT/05 - Analisi MatematicaBoundary value problemHomoclinic orbitPalais–Smale condition0101 mathematicsLaplace operatorAnalysisMathematicsJournal of Difference Equations and Applications
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ON A QUESTION OF BEIDLEMAN AND ROBINSON

2002

[EN] In [J. C. Beidleman, D. J. S. Robinson, J. Algebra 1997, 191, 686--703, Theorem A], Beidleman and Robinson proved that if a group satisfies the permutizer condition, it is soluble, its chief factors have order a prime number or 4 and G induces the full group of automorphisms in the chief factors of order 4. In this paper, we show that the converse of this theorem is false by showing some counterexamples. We also find some sufficient conditions for a group satisfying the converse of that theorem to satisfy the permutizer condition.

Pure mathematicsAlgebra and Number TheoryFinite soluble groupGroup (mathematics)Permutizer conditionPrime numberGrups Teoria deAutomorphismCombinatoricsConverseChief factorOrder (group theory)ÀlgebraAlgebra over a fieldMATEMATICA APLICADAMathematicsCounterexampleCommunications in Algebra
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Fixed points for Geraghty-Contractions in partial metric spaces

2015

We establish some fixed point theorems for mappings satisfying Geraghty-type contractive conditions in the setting of partial metric spaces and ordered partial metric spaces. Presented theorems extend and generalize many existing results in the literature. Examples are given showing that these results are proper extensions of the existing ones. c ©2014 All rights reserved.

Pure mathematicsAlgebra and Number TheoryInjective metric spaceEquivalence of metricsCoincidence point partial metric space ordered partial metric space Geraghty-type contractive condition fixed point.TopologyIntrinsic metricConvex metric spaceUniform continuityMetric spaceSettore MAT/05 - Analisi MatematicaFréchet spaceMetric mapAnalysisMathematicsJournal of Nonlinear Sciences and Applications
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Finite Trifactorized Groups and Formations

2000

This research is supported by Proyecto PB 97-0674-C02-02 of DGICYT, MEC, Spain.

Pure mathematicsAlgebra and Number TheoryMATEMATICA APLICADAMathematicsJournal of Algebra
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Coupled coincidence points for compatible mappings satisfying mixed monotone property

2012

We establish coupled coincidence and coupled fixed point results for a pair of mappings satisfying a compatibility hypothesis in partially ordered metric spaces. An example is given to illustrate our obtained results.

Pure mathematicsAlgebra and Number TheoryMonotone polygonProperty (philosophy)Settore MAT/05 - Analisi MatematicaCompatible mappings coupled fixed point mixed monotone property partially ordered setAnalysisCoincidenceMathematicsJournal of Nonlinear Sciences and Applications
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Some coincidence and periodic points results in a metric space endowed with a graph and applications

2015

The purpose of this paper is to obtain some coincidence and periodic points results for generalized $F$-type contractions in a metric space endowed with a graph. Some examples are given to illustrate the new theory. Then, we apply our results to establishing the existence of solution for a certain type of nonlinear integral equation.

Pure mathematicsAlgebra and Number TheoryPeriodic sequencePeriodic pointCoincidence point nonlinear integral equation periodic point.Type (model theory)TopologyNonlinear integral equationnonlinear integral equationCoincidenceCoincidence pointMetric spaceperiodic point54H25Settore MAT/05 - Analisi MatematicaGraph (abstract data type)05C40Coincidence pointAnalysis47H10Mathematics
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Fixed points for asymptotic contractions of integral Meir-Keeler type

2012

In this paper we introduce the notion of asymptotic contraction of integral Meir-Keeler type on a metric space and we prove a theorem which ensures existence and uniqueness of fixed points for such contractions. This result generalizes some recent results in the literature.

Pure mathematicsAlgebra and Number TheorySettore MAT/05 - Analisi MatematicaAsymptotic contractions of integral typeContractions of Meir-Keeler type.Fixed pointType (model theory)Fixed pointAnalysisMathematicsJournal of Nonlinear Sciences and Applications
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A fixed point theorem for a Meir-Keeler type contraction through rational expression

2013

In this paper, we establish a new fixed point theorem for a Meir-Keeler type contraction through rational expression. The presented theorem is an extension of the result of Dass and Gupta (1975). Some applications to contractions of integral type are given.

Pure mathematicsAlgebra and Number TheorySettore MAT/05 - Analisi MatematicaFixed-point theoremContraction (operator theory)Fixed point Meir-Keeler type contraction Rational expression Contraction of integral type.AnalysisMathematicsJournal of Nonlinear Sciences and Applications
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Local Spectral Theory for R and S Satisfying RnSRn = Rj

2020

In this paper, we analyze local spectral properties of operators R,S and RS which satisfy the operator equations RnSRn=Rj and SnRSn=Sj for same integers j&ge

Pure mathematicsAlgebra and Number TheorySpectral theoryDunford’s property (C) and property (β)Local spectral subspacesLogiclcsh:Mathematics010102 general mathematicsSpectral propertieslcsh:QA1-93901 natural sciences010101 applied mathematicsTheoryofComputation_MATHEMATICALLOGICANDFORMALLANGUAGESOperator (computer programming)Transmission (telecommunications)Settore MAT/05 - Analisi MatematicaDunford’s property (<i>C</i>) and property (<i>β</i>)Data_FILESDrazin invertible operatorsGeometry and Topology0101 mathematicsMathematical PhysicsAnalysisMathematicsAxioms
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