On D-connected sets in the space
On decompositions of Hausdorff continua [Book]
On decompositions of hereditarily unicoherent continua
On decompositions of λ-dendroids
On dimension of locally pseudocompact groups and their quotients
On filling an irreducible continuum with one point union of 2-cells
On Hausdorff compactifications of non-locally compact spaces.
On Hausdorff Quotients of Spaces and Magill's Theorem.
On infinite-dimensional manifolds
On maps of spaces determined by countable subspaces
On some metrizations of the hyperspace of compact sets
On Some Spaces which can be Partioned by the Rational Line.
On the hyperspace
Let be a continuum and a positive integer. Let be the hyperspace of all nonempty closed subsets of with at most components, endowed with the Hausdorff metric. For compact subset of , define the hyperspace . In this paper, we consider the hyperspace , which can be a tool to study the space . We study this hyperspace in the class of finite graphs and in general, we prove some properties such as: aposyndesis, local connectedness, arcwise disconnectedness, and contractibility.
On the singularity of Mazurkiewicz in absolute neighborhood retracts
On the strong local simple connectivity of the decomposition spaces of toroidal decompositions
On two theorems of Dyer
Parametric extension of the Poincaré theorem
Pasting topological spaces at one point
Let be a family of topological spaces and , for every . Suppose is the quotient space of the disjoint union of ’s by identifying ’s as one point . We try to characterize ideals of according to the same ideals of ’s. In addition we generalize the concept of rank of a point, see [9], and then answer the following two algebraic questions. Let be an infinite cardinal. (1) Is there any ring and an ideal in such that is an irreducible intersection of prime ideals? (2) Is there...
Products of quotients and of -spaces
Properties of the covering type and a factorization theorem