Results 51 to 60 of about 128 (122)

ON $\omega$-INDEPENDENCE AND THE KUNEN–SHELAH PROPERTY

open access: yes, 2002
We prove that spaces with an uncountable $\omega$-independent family fail the Kunen–Shelah property. Actually, if $\{x_i\}_{i\in I}$ is an uncountable $\omega$-independent family, there exists an uncountable subset $J\subset I$ such that $x_j\notin ...
Moreno, José Pedro   +5 more
core   +1 more source

Array convergence of functions of the first Baire-class [PDF]

open access: yes, 1991
We show that every array (x(i; j) : 1 i ! j ! 1) of elements in a pointwise compact subset of the Baire-1 functions on a Polish space, whose iterated pointwise limit lim i lim j x(i; j) exists, is converging Ramsey-uniformly. An array (x(i; j) i!j ) in
Helmut Knaust
core   +1 more source

Noncyclic Meir-Keeler contractions and best proximity pair theorems

open access: yesDemonstratio Mathematica, 2018
In this article, we consider the class of noncyclic Meir-Keeler contractions and study the existence and convergence of best proximity pairs for such mappings in the setting of complete CAT(0) spaces.
Gabeleh Moosa, Markin Jack
doaj   +1 more source

Common Fixed Point Theorem For Rational Expressions In 2-Banach Spaces

open access: yes, 2019
The study of non-contraction mapping concerning the existence of fixed points draws attention of various authors in non-linear analysis. Gahlar [6] introduced the concept of 2- Banach spaces. Badshah and Gupta [3] , Yadava, Rajput, Choudhary and Bhardwaj
Garg, Gaurav Kumar, GOYAL, A.K.
core   +1 more source

Reduction of finite exhausters

open access: yes
Minkowski–Rådström–Hörmander spaces, Exhausters, Pairs of closed bounded convex sets, 46B20, 52A05, 54B20,
Ryszard Urbański   +2 more
core   +1 more source

New contributions to best proximity theory using proximal projection operators in hyperbolic metric spaces

open access: yesDemonstratio Mathematica
Let (E, F) be a nonempty pair subsets of a metric space (M, d) and let T:E∪F→E∪F $\mathcal{T} : E\cup F\to E\cup F$ be a noncyclic mapping, means that, T(E)⊆E,T(F)⊆F $\mathcal{T}\left(E\right)\subseteq E,\mathcal{T}\left(F\right)\subseteq F$ .
Gabeleh Moosa   +2 more
doaj   +1 more source

Hyperbolic Metric Spaces and Stochastic Embeddings

open access: yesForum of Mathematics, Sigma
Stochastic embeddings of finite metric spaces into graph-theoretic trees have proven to be a vital tool for constructing approximation algorithms in theoretical computer science.
Chris Gartland
doaj   +1 more source

Notes on Knaster-Tarski Theorem versus Monotone Nonexpansive Mappings

open access: yesMoroccan Journal of Pure and Applied Analysis, 2018
The purpose of this note is to discuss the recent paper of Espínola and Wiśnicki about the fixed point theory of monotone nonexpansive mappings. In their work, it is claimed that most of the fixed point results of this class of mappings boil down to the ...
Khamsi Mohamed Amine
doaj   +1 more source

On non-reflexive subspaces of orlicz spaces

open access: yes, 2004
and Key words unavailable at this time...Mathematics Subject Classification (2000): 46B20, 46E30.
Echandía, Ventura, Bárcenas, Diómedes
core  

Extreme 2-Homogeneous polynomials on hilbert spaces

open access: yes, 2004
unavailable at this time... Mathematics Subject Classification (2000):Primary 46B20; Secondary 46G20, 46E50, 46C99 Quaestiones Mathematicae 25 (2002), 421 ...
Grecu, Bogdan C.
core  

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