On the closure of the diagonal of a $T_1$-space

On the coarsest topology preserving continuity

On the conditions of topological equivalence of pseudoharmonic functions defined on disk

On the continuity of the Hutchinson operator

On the criteria of D-planarity of a tree

On the dimension of CAT(0) spaces where mapping class groups act

On the hereditary paracompactness of locally compact, hereditarily normal spaces

On the Intuitionistic fuzzy topological (metric and normed) spaces

On the Kocinac alpha_i properties

On the Lusternik-Schnirelmann category of symmetric spaces of classical type

On the Maćkowiak-Tymchatyn theorem

On the Menger covering property and $D$-spaces

On the metrizability of spaces with a sharp base

On the number of inscribed squares of a simple closed curve in the plane

On The Pairwise Weakly Lindelof Bitopological Spaces

On the Pytkeev property in spaces of continuous functions

On the Pytkeev property in spaces of continuous functions (II)

On the quasi-component of pseudocompact abelian groups

On the realization of graph as invariant of pseudoharmonic functions

On the Semicontinuity in Product Spaces