Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5777740 | Topology and its Applications | 2017 | 4 Pages |
Abstract
It is shown that a subspace of a product of countably many LaÅ¡nev spaces is Pytkeev if and only if it has countable tightness. In particular, this implies a result [6] that for an ultrafilter p on Ï, the space {p}âªÏ cannot be embedded in any product of countably many LaÅ¡nev spaces.
Related Topics
Physical Sciences and Engineering
Mathematics
Geometry and Topology
Authors
Yoko Oda, Kenichi Tamano,