Results 71 to 80 of about 116 (102)

A pseudocompact meta-lindeöf space which is not compact

open access: yesTopology and its Applications, 1985
A Tychonoff space is pseudocompact if every countable open filter base has a cluster point. A space is called meta-Lindelöf provided every open cover of the space has a point-countable open refinement. The example constructed in this paper (described in the title) can be compared with a theorem of D. K. Burke and S. W.
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Pseudocompact Spaces [PDF]

open access: yesTransactions of the American Mathematical Society, 1968
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Products of sequentially pseudocompact spaces

open access: yes, 2012
We show that the product of any number of sequentially pseudocompact topological spaces is still sequentially pseudocompact. The definition of sequential pseudocompactness can be given in (at least) two ways: we show their equivalence. Some of the results of the present note already appeared in A. Dow, J. R. Porter, R. M. Stephenson, R. G.
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On Coincidence Points in Pseudocompact Tichonov Spaces

open access: yesJournal of Ultra Scientist of Physical Sciences Section A, 2017
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Pseudocompact $$\varDelta $$-spaces are often scattered

Monatshefte Fur Mathematik, 2021
The following definition was given in [\textit{J. Kąkol} and \textit{A. Leiderman}, Proc. Am. Math. Soc., Ser. B 8, 86--99 (2021; Zbl 1473.54018)]: A space \(X\) is a \(\Delta\)-\emph{space} if for any decreasing sequence \(\mathcal{S}=\{X_n:n\in\omega\}\) of subsets of \(X\) with empty intersection, there exists a sequence \(\{U_n:n\in\omega\}\) of ...
Arkady Leiderman   +2 more
exaly   +2 more sources

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