EuDML | Browse

Displaying 61 – 75 of 75

Almost contra-precontinuous functions.

Ekici, Erdal (2004)

Bulletin of the Malaysian Mathematical Sciences Society. Second Series

Almost ${\tilde{g}}_{α}$ -closed functions and separation axioms

O. Ravi, S. Ganesan, R. Latha (2012)

Mathematica Bohemica

We introduce a new class of functions called almost ${\tilde{g}}_{α}$ -closed and use the functions to improve several preservation theorems of normality and regularity and also their generalizations. The main result of the paper is that normality and weak normality are preserved under almost ${\tilde{g}}_{α}$ -closed continuous surjections.

Almost $δ$ -precontinuous multifunctions.

Ekici, Erdal (2005)

Bulletin of the Malaysian Mathematical Sciences Society. Second Series

Almost-Homeomorphisms And Almost-Topological Properties.

Cammaroto. Filippo (1986)

Revista colombiana de matematicas

An algebraic and logical approach to continuous images

Klaas Pieter Hart (2002)

Acta Universitatis Carolinae. Mathematica et Physica

An atomic map onto an arbitrary metric continuum

A. Emeryk (1972)

Fundamenta Mathematicae

An Exactly Two-to-One Map from an Indecomposable Chainable Continuum

Jerzy Krzempek (2004)

Bulletin of the Polish Academy of Sciences. Mathematics

It is shown that a certain indecomposable chainable continuum is the domain of an exactly two-to-one continuous map. This answers a question of Jo W. Heath.

An example for mappings related to confluence

Pavel Pyrih (1999)

Archivum Mathematicum

Confluence of a mapping between topological spaces can be defined by several ways. J.J. Charatonik asked if two definitions of the confluence using the components and quasi-components are equivalent for surjective mappings with compact point inverses. We give the negative answer to this question in Example 2.1.

An example for mappings related to semi-confluence.

Pyrih, Pavel (2000)

Southwest Journal of Pure and Applied Mathematics [electronic only]

An example of a space whose all continuous mappings are almost injective

Pablo Mendoza Iturralde (2001)

Commentationes Mathematicae Universitatis Carolinae

We show that all continuous maps of a space $X$ onto second countable spaces are pseudo-open if and only if every discrete family of nonempty $G_{δ}$ -subsets of $X$ is finite. We also prove under CH that there exists a dense subspace $X$ of the real line $ℝ$ , such that every continuous map of $X$ is almost injective and $X$ cannot be represented as $K \cup Y$ , where $K$ is compact and $Y$ is countable. This partially answers a question of V.V. Tkachuk in [Tk]. We show that for a compact $X$ , all continuous maps of $X$ onto second...

A-spaces and countably bi-quotient maps [Book]

E. Michael, R. C. Olson, F. Siwiec (1976)

Automorphism groups of complements of points

Michael Hrušák (1994)