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Frédéric Mynard (2002)
Commentationes Mathematicae Universitatis Carolinae
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Strongly sequential spaces were introduced and studied to solve a problem of Tanaka concerning the product of sequential topologies. In this paper, further properties of strongly sequential spaces are investigated.
Huang, Nan-Jing, Lan, Heng-You, Teo, Kok Lay (2007)
Journal of Inequalities and Applications [electronic only]
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Bosch, C., Gilsdorf, T., Gómez, C., Vera, R. (2002)
International Journal of Mathematics and Mathematical Sciences
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Chuan Liu (2006)
Commentationes Mathematicae Universitatis Carolinae
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In this paper, it is proved that a first-countable paratopological group has a regular -diagonal, which gives an affirmative answer to Arhangel’skii and Burke’s question [, Topology Appl. (2006), 1917–1929]. If is a symmetrizable paratopological group, then is a developable space. We also discuss copies of and of in paratopological groups and generalize some Nyikos [, Proc. Amer. Math. Soc. (1981), no. 4, 793–801] and Svetlichnyi [, Vestnik Moskov. Univ. Ser. I Mat. Mekh....