Hereditary m-separability and the hereditary m-Lindelöf property in product spaces and function spaces
Homomorphic images of -factorizable groups
It is well known that every -factorizable group is -narrow, but not vice versa. One of the main problems regarding -factorizable groups is whether this class of groups is closed under taking continuous homomorphic images or, alternatively, whether every -narrow group is a continuous homomorphic image of an -factorizable group. Here we show that the second hypothesis is definitely false. This result follows from the theorem stating that if a continuous homomorphic image of an -factorizable...
How sensitive is to changes in and/or ?
We investigate how the Lindelöf property of the function space is influenced by slight changes in and/or .
Hurewicz properties, non distinguishing convergence properties and sequence selection properties