Department of Mathematics, York University, 4700 Keele St., North York, Ontario M3J 1P3 Canada
Stephen Watson ; Department of Mathematics, York University, 4700 Keele St., North York, Ontario M3J 1P3 Canada
Abstract:
In this paper, we construct a regular space with a countable network (even the union of countably many separable metric subspaces) in which and do not coincide under the assumption of the continuum hypothesis (CH). This gives a consistent negative answer to a question of A.V. Arhangel'skii.