Ideals of the semigroup of ultrafilters of a topological group

• Date: 1995
• Main Authors: Protasov, I. V., Протасов, И. В.
• Format: Article
• Language: Russian; English
• Published: Institute of Mathematics, NAS of Ukraine 1995
• Online Access: https://umj.imath.kiev.ua/index.php/umj/article/view/5448
• Journal Title: Ukrains’kyi Matematychnyi Zhurnal

We construct two new series of closed left ideals of the semigroup \(\bar \tau \) of ultrafilters of a topological group (G, τ). The first series gives a disjunctive decomposition of τ-absorbing ultrafilters. Under certain restrictions on the topology of the group (G, τ), the second series gives...