On resolvable spaces and groups
It is proved that every uncountable -bounded group and every homogeneous space containing a convergent sequence are resolvable. We find some conditions for a topological group topology to be irresolvable and maximal.
On -closedness and -closedness in topological spaces
On -cluster sets and -closed spaces.
On -metrizable spaces
On semi-closed sets and semi-open sets and their applications
On semicompact sets and associated properties.
On separability in semi-stratifiable spaces
On separation axioms in intuitionistic topological spaces.
On separation of lattices.
On Sequence-covering mssc-images of Locally Separable Metric Spaces
On sequence-covering --images of locally separable metric spaces
On set tightness and -tightness
On sets of confluent and related mappings in the space
On shapes of topological spaces
On some classes of compact spaces lying in -products
On some classes of spaces with the -property
We shall prove that under CH every regular meta-Lindelöf -space which is locally has the -property. In addition, we shall prove that a regular submeta-Lindelöf -space is if it is locally and has locally extent at most . Moreover, these results can be extended from the class of locally -spaces to the wider class of -scattered spaces. Also, we shall give a direct proof (without using topological games) of the result shown by Peng [On spaces which are D, linearly D and transitively D, Topology...
On some covering properties of metric spaces
On some generalizations of LC-spaces.
On some maps concerning -open sets.
On some modifications of fuzzy topology