Topology Seminar

Speaker: Peter Nyikos

Time and Place: Wednesday, March 31, LeConte 312, 3:45pm - 4:35pm

Subject: Stationary sets of countable ordinals

Abstract: Stationary subsets are "large" subsets of the set of all countable ordinals. One of the many applications of this "largeness" will be presented: using them to produce a variety of first countable normal spaces with non-normal subspaces.