In 1998, S. Romaguera [13] introduced the notion of cofinally Čech-complete spaces equivalent to spaces which we later called ultracomplete spaces. We define the subset of points of a space $X$ at which $X$ is not locally compact and call it an nlc set. In 1999, Garc'{\i}a-Máynez and S. Romaguera [6] proved that every cofinally Čech-complete space has a bounded nlc set. In 2001, D. Buhagiar [1] proved that every ultracomplete GO-space has a compact nlc set. In this paper, ultracomplete spaces which have compact nlc sets are studied. Such spaces contain dense locally compact subspaces and coincide with ultracomplete spaces in the realms of normal $\gamma$-spaces or ks-spaces.
@article{119358, author = {Iwao Yoshioka}, title = {On the subsets of non locally compact points of ultracomplete spaces}, journal = {Commentationes Mathematicae Universitatis Carolinae}, volume = {43}, year = {2002}, pages = {707-721}, zbl = {1090.54002}, mrnumber = {2046191}, language = {en}, url = {http://dml.mathdoc.fr/item/119358} }
Yoshioka, Iwao. On the subsets of non locally compact points of ultracomplete spaces. Commentationes Mathematicae Universitatis Carolinae, Tome 43 (2002) pp. 707-721. http://gdmltest.u-ga.fr/item/119358/
Non locally compact points in ultracomplete topological spaces, Questions Answers Gen. Topology 19 (2001), 125-131. (2001) | MR 1815353 | Zbl 0976.54025
Ultracomplete topological spaces, to appear in Acta Math. Hungar. 92 (2001). (2001) | MR 1924245 | Zbl 0997.54037
Sums and products of ultracomplete spaces, to appear in Topology Appl. | MR 1919293
Conditions which imply compactness in countably compact spaces, Bull. Acad. Pol. Sci. Ser. Math. 24 (1976), 993-998. (1976) | MR 0515000
General Topology, Polish Sci. Publ., Warsaw, 1977. | MR 0500780 | Zbl 0684.54001
Perfectly pre-images of cofinally complete metric spaces, Comment. Math. Univ. Carolinae 40 (1999), 335-342. (1999) | MR 1732655
Some properties of compactifications, Duke Math. J. 35 (1958), 83-105. (1958) | MR 0096196 | Zbl 0081.38604
Spaces defined by sequences of open covers which guarantee that certain sequences have cluster points, Duke Math. J. 39 (1972), 253-263. (1972) | MR 0293580 | Zbl 0242.54027
On completeness, Pacific J. Math. 38 (1971), 431-440. (1971) | MR 0307183 | Zbl 0221.54027
Semimetrizable and stratifiable spaces, Gen. Topology Appl. 1 (1971), 43-48. (1971) | MR 0296893 | Zbl 0211.25704
A quintuple quotient quest, Gen. Topology Appl. 2 (1972), 91-138. (1972) | MR 0309045 | Zbl 0238.54009
Modern General Topology, North-Holland Math. Library, Amsterdam, 1985, second revised edition. | MR 0831659 | Zbl 0598.54001
On cofinally complete metric spaces, Questions Answers Gen. Topology 16 (1998), 165-170. (1998) | MR 1642068 | Zbl 0941.54030
Spaces of countable and point-countable type, Trans. Amer. Math. Soc. 151 (1970), 341-351. (1970) | MR 0266157 | Zbl 0203.55403
On the metrizations of $\gamma$-spaces and ks-spaces, Questions Answers Gen. Topology 19 (2001), 55-72. (2001) | MR 1815346 | Zbl 0983.54030