On totally Lindel\"of spaces

Abstract

The results in this paper answer three questions asked by (NOBLE, 2019) and give a partial answer to a question asked by (ALSTER, 1988). We prove that every Alster space is totally Lindelof and this gives a new characterization of regular Alster spaces. We construct a non-regular totally Lindelof space that is not Alster and we prove that there exists a Lindelof P-space that is not Frolik.