Results 241 to 250 of about 1,281,596 (279)

Problems on star-covering properties

2007
We consider some questions about properties defined in terms of stars with respect to open ...
BONANZINGA, Maddalena, MATVEEV M. V.
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Geotechnical Properties of Cover Beds

2013
Abstract The occurrence and spatial distribution of cover beds are decisive for modern hillslope morphodynamics. This aspect is strongly associated with the geotechnical properties of cover beds and especially with their anisotropy. The impact of periglacial cover beds on mass movements, in particular landslides in subdued mountains, will be ...
B. Damm, B. Terhorst, F. Ottner
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Weak Covering Properties of Weak Topologies

Proceedings of the London Mathematical Society, 1997
In 1980, S. Gul'ko posed the problem whether the space \(C_p(K)\) is hereditarily meta-Lindelöf for every compact space \(K\). Later R. Hanswell asked whether such a space is weakly \(\theta\)-refinable. It is shown in the paper that the space \(C_p(\beta \omega_1)\) is a counterexample to both questions, and \(C_p (\beta \omega_1)\) is not even weakly
Dow, Alan, Junnila, H., Pelant, Jan
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An Open Cover Specification Property

Journal of Dynamical and Control Systems
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Kumar, Devender, Das, Ruchi
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On fuzzy covering properties

Periodica Mathematica Hungarica, 2007
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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Relative covering properties

2001
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
GUIDO, Cosimo, KOCINAC L. D. R.
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A covering property in principal bundles

2018
Summary: Let \(p:X\to B\) be a locally trivial principal \(G\)-bundle and \(\widetilde{p}:\widetilde{X}\to B\) be a locally trivial principal \(\widetilde{G}\)-bundle. In this paper, by using the structure of principal bundles according to transition functions, we show that \(\widetilde{G}\) is a covering group of \(G\) if and only if \(\widetilde{X}\)
Pakdaman, A., Attary, M.
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Small Coverings with Smooth Functions under the Covering Property Axiom

Canadian Journal of Mathematics, 2005
AbstractIn the paper we formulate a Covering Property Axiom, CPAprism, which holds in the iterated perfect set model, and show that it implies the following facts, of which (a) and (b) are the generalizations of results of J. Steprāns.(a) There exists a family ℱ of less than continuummany functions from ℝ to ℝ such that ℝ2 is covered by functions from
Ciesielski, Krzysztof, Pawlikowski, Janusz   +1 more
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Topological Extension Properties and Projective Covers

Canadian Journal of Mathematics, 1982
Introduction. All spaces considered in this paper are assumed to be (Hausdorff) completely regular, and all maps are continuous. Let be a topological property of spaces. We shall identify with the class of spaces having . A space having is called a -space, and a subspace of a -space is called a -regular space. The class of -regular spaces is denoted
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Some Properties of Precovers and Covers

Algebras and Representation Theory, 2009
Let \(\mathcal G\) be a hereditary class of modules. Then \(\mathcal G\)-covers are characterized in terms of injectivity of homomorphisms into \(\mathcal G\)-precovers and of surjectivity of homomorphisms from \(\mathcal G\)-precovers. Also, the author establishes several properties of (pre)covers of (relatively) injective modules and some relations ...
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