Results 31 to 40 of about 245 (181)
Some Results on Pixley–Roy Hyperspaces
Journal of Mathematics, 2022 In this paper, we prove that if a space X has a point-countable cn-network, then the Pixley-Roy hyperspace PRX also has a point-countable cn-network. If X is a regular space with a point-countable ck-network, then so does the Pixley-Roy hyperspace PRX ...
Ljubiša D. R. Kočinac +2 more
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Free Cells in Hyperspaces of Graphs
Mathematics, 2021 Often for understanding a structure, other closely related structures with the former are associated. An example of this is the study of hyperspaces. In this paper, we give necessary and sufficient conditions for the existence of finitely-dimensional ...
José Ángel Juárez Morales +3 more
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Almost strongly star-Menger and related properties
Applied General TopologyIn this paper we introduce the almost strongly star-Menger property and we provide some results and relationships with another known properties in literature.
Ricardo Cruz-Castillo +2 more
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A parsimonious structure model for the icosahedral quasicrystal Cd5.7Yb
Acta Crystallographica Section A, EarlyView.The paper presents a parsimonious structure model for the icosahedral Cd5.7Yb quasicrystal. It employs only spherical and elliptical occupation domains, which significantly decreases the number of parameters and the required calculation effort. Still, the model describes the characteristic structural features with considerable accuracy.A compact ...
M. Feuerbacher
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Topology and its Applications, 2004 Given a metric continuum \(X\), let \(2^X\), \(C(X)\) and \(C_2(X)\) denote the hyperspaces of all nonempty closed subsets, subcontinua, and closed subsets with at most two components of \(X\), respectively (with the Hausdorff metric). For a fixed point \(p \in X\) the symbols \(2^X_p\), \(C(p,X)\) and \(C_2(p,X)\) denote the subspaces consisting of ...
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Polynomial entropy on regular curves
Applied General TopologyWe show that the polynomial entropy of homeomorphisms on regular curves is bounded above by one. Moreover, the polynomial entropy equals one under the fairly mild condition that the homeomorphism possesses a wandering point.
Maša Đorić, Jelena Katić
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Developable hyperspaces are metrizable
Applied General Topology, 2003 Developability of hyperspace topologies (locally finite, (bounded) Vietoris, Fell, respectively) on the nonempty closed sets is characterized. Submetrizability and having a Gδ-diagonal in the hyperspace setting is also discussed.
L'Ubica Holá +2 more
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VOID URBANISM: Unbuilt New Cities and State Formation in the Democratic Republic of Congo
International Journal of Urban and Regional Research, EarlyView.Abstract Based on an analysis of the planning process behind Kitoko City in the Democratic Republic of Congo—a new city project officially launched in 2019 but never implemented—this article examines the political, social, and spatial effects generated by urban initiatives that remain at the stage of intention. It investigates how such unbuilt projects
Patrick Belinga Ondoua
wiley +1 more source
Australian Journal of Politics &History, EarlyView.ABSTRACT This article explores Australian media commentary on white Rhodesians migrating to Australia, focusing on the period of Malcolm Fraser's prime ministership (1975–1983). The main argument is that the Australian media debates about whether to classify white Rhodesians as ‘migrants’ or ‘refugees’ were not merely semantic but reflected a deeper ...
George Bishi, Ana Stevenson
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On the compactness of the hyperspace of faces [PDF]
Pacific Journal of Mathematics, 1977 By a flat we mean a translate of a subspace of R and by a hyperplane, a flat of dimension d — 1. If X is a compact convex subset of R the symbols dim (X), rel int (X), and rel bd (X) denote respectively, the dimension of the flat generated by X, the interior, and the boundary of X with respect to the flat X generates.
Reiter, H. B., Stavrakas, N. M.
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