EuDML | Browse

We construct a family of spaces with “nice” structure which is universal in the class of all compact metrizable spaces of large transfinite dimension $ω_{0}$ , or, equivalently, of small transfinite dimension $ω_{0}$ ; that is, the family consists of compact metrizable spaces whose transfinite dimension is $ω_{0}$ , and every compact metrizable space with transfinite dimension $ω_{0}$ is embeddable in a space of the family. We show that the least possible cardinality of such a universal family is equal to the least possible...

Urysohn’s lemma, gluing lemma and contraction $^{*}$ mapping theorem for fuzzy metric spaces

Elango Roja, Mallasamudram Kuppusamy Uma, Ganesan Balasubramanian (2008)

Mathematica Bohemica

In this paper the concept of a fuzzy contraction $^{*}$ mapping on a fuzzy metric space is introduced and it is proved that every fuzzy contraction $^{*}$ mapping on a complete fuzzy metric space has a unique fixed point.

Variational stability and well-posedness in the optimal control of ordinary differential equations

T. Zolezzi (1985)

Banach Center Publications

Verallgemeinerte topogene Ordnungen.

Dieter Leseberg (1985)

Monatshefte für Mathematik

Vervollständigung streng ausgeglichener Limesvektorräume I.

Sten Bjon (1977)

Mathematica Scandinavica

Vervollständigung streng ausgeglichener Limesvektorräume II.

Sten Bjon (1977)

Mathematica Scandinavica

Viètes Tangentenkonstruktion und eine Klasse ebener Kurven.

A. Voigt (1986)

Elemente der Mathematik

$W θ g$ -closed and $W δ g$ -closed in $[0, 1]$ -topological spaces.

El-Shafei, M.E., Zakari, A.H. (2011)

International Journal of Mathematics and Mathematical Sciences

Warped compact foliations

Szymon M. Walczak (2008)

Annales Polonici Mathematici

The notion of the Hausdorffized leaf space $\tilde{}$ of a foliation is introduced. A sufficient condition for warped compact foliations to converge to $\tilde{}$ is given. Moreover, a necessary condition for warped compact Hausdorff foliations to converge to $\tilde{}$ is shown. Finally, some examples are examined.

Weak calibers and the Scott-Watson theorem

Alessandro Fedeli (1996)

Czechoslovak Mathematical Journal

Weak continuity of fuzzy-valued maps

A. Jankowska (1990)

Matematički Vesnik

Weak extent in normal spaces

Ronnie Levy, Mikhail Matveev (2005)

Commentationes Mathematicae Universitatis Carolinae

If $X$ is a space, then the weak extent $we (X)$ of $X$ is the cardinal $min {α :$ If $𝒰$ is an open cover of $X$ , then there exists $A \subseteq X$ such that $| A | = α$ and $St (A, 𝒰) = X}$ . In this note, we show that if $X$ is a normal space such that $| X | = 𝔠$ and $we (X) = ω$ , then $X$ does not have a closed discrete subset of cardinality $𝔠$ . We show that this result cannot be strengthened in ZFC to get that the extent of $X$ is smaller than $𝔠$ , even if the condition that $we (X) = ω$ is replaced by the stronger condition that $X$ is separable.

Weak forms of continuity in fuzzy topology

Z. Petrićević (1990)

Matematički Vesnik

Weakly fuzzy topological entropy

B M Uzzal Afsan (2022)

Mathematica Bohemica

In 2005, İ. Tok fuzzified the notion of the topological entropy R. A. Adler et al. (1965) using the notion of fuzzy compactness of C. L. Chang (1968). In the present paper, we have proposed a new definition of the fuzzy topological entropy of fuzzy continuous mapping, namely weakly fuzzy topological entropy based on the notion of weak fuzzy compactness due to R. Lowen (1976) along with its several properties. We have shown that the topological entropy R. A. Adler et al. (1965) of continuous mapping...

Weakly induced modifications of $I$ -fuzzy topologies.

Yue, Yueli, Fang, Jinming (2006)

International Journal of Mathematics and Mathematical Sciences

Weight of a compactification and generating sets of functions

A. Caterino, M. C. Vipera (1988)

Rendiconti del Seminario Matematico della Università di Padova

Currently displaying 1301 – 1320 of 1389

Previous Page 66 Next