Results 51 to 60 of about 126,975 (166)

Quasi $M$-compact spaces [PDF]

open access: yesCzechoslovak Mathematical Journal, 1996
All spaces are Tychonoff, and \(\alpha\) is an infinite cardinal number. Recall that a space \(X\) is said to be initially \(\alpha\)-compact if every open cover of \(X\) of cardinality \(\leq\alpha\) has a finite subcover, and given a subset \(\emptyset\neq M\subseteq\alpha^*= \beta(\alpha)\smallsetminus\alpha\), a space \(X\) is \(M\)-compact (quasi \
openaire   +2 more sources

Performance Analysis of Large-Scale Digital Phased Array Mixed-ADC Receiver in Compact Space

open access: yes天地一体化信息网络
In order to evaluate the performance of large-scale digital phased array mixed-ADC receivers under the influence of mutual coupling effects in compact spaces, a performance analysis method was proposed.
ZHANG Yi   +5 more
doaj  

Functionally compact spaces [PDF]

open access: yesPacific Journal of Mathematics, 1969
Dickman, R. F., Zame, A.
openaire   +2 more sources

On θ-regular spaces

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1994
In this paper we study θ-regularity and its relations to other topological properties. We show that the concepts of θ-regularity (Janković, 1985) and point paracompactness (Boyte, 1973) coincide.
Martin M. Kovár
doaj   +1 more source

Continuous functions with compact support

open access: yesApplied General Topology, 2004
The main aim of this paper is to investigate a subring of the ring of continuous functions on a topological space X with values in a linearly ordered field F equipped with its order topology, namely the ring of continuous functions with compact support ...
Sudip Kumar Acharyya   +2 more
doaj   +1 more source

Some remarks on Pixley-Roy hyperspaces

open access: yesTạp chí Khoa học Đại học Huế: Khoa học Tự nhiên
In this paper, we study cellular-compact, cellular-Lindel\"of, strongly star-Hurewicz, strongly star-Rothberger, strongly star-Menger spaces on hyperspaces with the Pixley-Roy topology.
Quoc Tuyen Luong   +2 more
doaj   +1 more source

Reconstructing compact metrizable spaces

open access: yesProceedings of the American Mathematical Society, 2016
15 pages, 2 ...
Gartside, P, Pitz, M, Suabedissen, R
openaire   +4 more sources

Some properties of b-weakly compact operators on Banach lattices

open access: yesپژوهش‌های ریاضی, 2021
In this paper we give some necessary and sufficient conditions for which each Banach lattice  is    space and we study some properties of b-weakly compact operators from a Banach lattice  into a Banach space .
Kazem Haghnejad azar, Akbar Bahramnezhad
doaj  

Free Subspaces of Free Locally Convex Spaces

open access: yesJournal of Function Spaces, 2018
If X and Y are Tychonoff spaces, let L(X) and L(Y) be the free locally convex space over X and Y, respectively. For general X and Y, the question of whether L(X) can be embedded as a topological vector subspace of L(Y) is difficult.
Saak S. Gabriyelyan, Sidney A. Morris
doaj   +1 more source

On strong form of Arzela convergence

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1997
We define some new type of convergence of nets of functions which is formulated in terms of open covers. It preserves continuity and under some assumptions implies (or coincides with) the Arzela quasi-uniform convergence.
Janina Ewert
doaj   +1 more source

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