arXiv subjects

Lubica Holá

Publications and source records attributed to Lubica Holá.

3 recordsLinked to original sources

arXiv2013

Completeness and related properties of the graph topology on function spaces

The graph topology $τ_Γ$ is the topology on the space $C(X)$ of all continuous functions defined on a Tychonoff space $X$ inherited from the Vietoris topology on $X\times \mathbb R$ after identifying continuous functions with their graphs. It is shown that all completeness properties between complete metrizability and hereditary Baireness coincide for the graph topology if and only if $X$ is countably compact; however, the graph topology is $α$-favorable in the strong Choquet game, regardless of $X$. Analogous results are obtained for the fine topology on $C(X)$. Pseudocompleteness, along with properties related to 1st and 2nd countability of $(C(X),τ_Γ)$ are also investigated.

math.GN↗

arXiv2012

Topologies of (strong) uniform convergence on bornologies

We continue the study of topologies of strong uniform convergence on bornologies initiated in [G. Beer and S. Levi, Strong uniform continuity, J. Math Anal. Appl., 350:568-589, 2009] and [G. Beer and S. Levi, Uniform continuity, uniform convergence and shields, Set-Valued and Variational Analysis, 18:251-275, 2010]. We study cardinal invariants of topologies of (strong) uniform convergence on bornologies on the space of continuous real-valued functions and we also generalize some known results from the literature.

math.GN↗

arXiv2011

On normality of the Wijsman topology

Let $(X,ρ)$ be a metric space and $(CL(X),W_ρ)$ be the hyperspace of all nonempty closed subsets of $X$ equipped with the Wijsman topology. The Wijsman topology is one of the most important classical hyperspace topologies. We give a partial answer to a question posed in \cite{maio} whether the normality of $(CL(X),W_ρ)$ is equivalent to its metrizability. If $(X,ρ)$ is a linear metric space, then $(CL(X),W_ρ)$ is normal if and only if $(CL(X),W_ρ)$ is metrizable. Some further results concerning normality of the Wijsman topology on $CL(X)$ are also proved.

math.GN↗