AbstractE. Reznichenko and O. Sipacheva called a space X “Fréchet–Urysohn for finite sets” if the following holds for each point x∈X: whenever P is a collection of finite subsets of X such that every neighborhood of x contains a member of P, then P contains a subfamily that converges to x. We continue their study of this property. We also look at analogous notions obtained by restricting to collections P of bounded size, we discuss connections with topological groups, the αi-properties of A.V. Arhangel'skii, and with a certain topological game
Using Mizar [9], and the formal topological space structure (FMT_Space_Str) [19], we introduce the t...
AbstractWe shall discuss the possibility of slicing MAD families. As an application we present an ex...
AbstractLet F[X] be the Pixley–Roy hyperspace of a regular space X. In this paper, we prove the foll...
AbstractE. Reznichenko and O. Sipacheva called a space X “Fréchet–Urysohn for finite sets” if the fo...
AbstractWe continue our study [G. Gruenhage, P.J. Szeptycki, Fréchet Urysohn for finite sets, Topolo...
Abstract. We continue our study [6] of several variants of the property of the title. We answer a qu...
AbstractThe study of the Fréchet–Urysohn property with respect to a family of subsets started by Rez...
[EN] The finite derived set property asserts that any infinite subset of a space has an infinite sub...
We give conditions under which iterated hyperspaces of finite subsets, with Ochan’s topology, are h...
summary:Some strong versions of the Fréchet-Urysohn property are introduced and studied. We also str...
AbstractArhangel'skiǐ defined a number of related properties called αi (i = 1, 2, 3, 4) having to do...
Neighborhood spaces, pretopological spaces, and closure spaces are topological space generalizations...
In this paper, we have discussed the definitions and the basic properties of open sets, closed sets,...
Our slogan is topology is about convergence. Mostly we are familiar with convergence of sequences. R...
AbstractBy a result of A.V. Arhangel'skiǐ and E.G. Pytkeiev, the space C(X) of the continuous real f...
Using Mizar [9], and the formal topological space structure (FMT_Space_Str) [19], we introduce the t...
AbstractWe shall discuss the possibility of slicing MAD families. As an application we present an ex...
AbstractLet F[X] be the Pixley–Roy hyperspace of a regular space X. In this paper, we prove the foll...
AbstractE. Reznichenko and O. Sipacheva called a space X “Fréchet–Urysohn for finite sets” if the fo...
AbstractWe continue our study [G. Gruenhage, P.J. Szeptycki, Fréchet Urysohn for finite sets, Topolo...
Abstract. We continue our study [6] of several variants of the property of the title. We answer a qu...
AbstractThe study of the Fréchet–Urysohn property with respect to a family of subsets started by Rez...
[EN] The finite derived set property asserts that any infinite subset of a space has an infinite sub...
We give conditions under which iterated hyperspaces of finite subsets, with Ochan’s topology, are h...
summary:Some strong versions of the Fréchet-Urysohn property are introduced and studied. We also str...
AbstractArhangel'skiǐ defined a number of related properties called αi (i = 1, 2, 3, 4) having to do...
Neighborhood spaces, pretopological spaces, and closure spaces are topological space generalizations...
In this paper, we have discussed the definitions and the basic properties of open sets, closed sets,...
Our slogan is topology is about convergence. Mostly we are familiar with convergence of sequences. R...
AbstractBy a result of A.V. Arhangel'skiǐ and E.G. Pytkeiev, the space C(X) of the continuous real f...
Using Mizar [9], and the formal topological space structure (FMT_Space_Str) [19], we introduce the t...
AbstractWe shall discuss the possibility of slicing MAD families. As an application we present an ex...
AbstractLet F[X] be the Pixley–Roy hyperspace of a regular space X. In this paper, we prove the foll...