On pointwise limits of sequences of -continuous functions
On pointwise smooth dendroids
On Polish spaces Lipschitz universal for separable metric spaces
On polynomial mappings into spheres
On. positions of sets in spaces.
On positively expansive differentiable maps
On powers of Lindelöf spaces
We present a forcing construction of a Hausdorff zero-dimensional Lindelöf space whose square is again Lindelöf but its cube has a closed discrete subspace of size , hence the Lindelöf degree . In our model the Continuum Hypothesis holds true. After that we give a description of a forcing notion to get a space such that for all positive integers , but .
On Pre-analytic Spaces.
On preimages of ultrafilters in ZF
We show that given infinite sets and a function which is onto and -to-one for some , the preimage of any ultrafilter of under extends to an ultrafilter. We prove that the latter result is, in some sense, the best possible by constructing a permutation model with a set of atoms and a finite-to-one onto function such that for each free ultrafilter of its preimage under does not extend to an ultrafilter. In addition, we show that in there exists an ultrafilter compact pseudometric...
On Preservation Of Normality.
On preserving the fixed point property by mappings
On Prešić type generalization of the Banach contraction mapping principle.
On pre-Urysohn spaces.
On Priestley duals of products
On prime ideals of
On probabilistic normed spaces under .
On products of incompressible AR's
On products of pseudoradial ѕpaces
On products of semi-dynamical systems
On profinite universal algebras