9 citations · 38 across the 24 of their papers we have counts for
8 papers · 1 filter
Extensive approach to absolute homogeneity
Piotr Niemiec
The main aim of the paper is to study in greater detail absolutely homogeneous structures (that is, objects with the property that each partial isomorphism extends to a global auto…
Problem with almost everywhere equality
Piotr Niemiec
A topological space is said to have (AEEP) if the following condition is fulfilled. Whenever is a measurable space and are two measurable fun…
Normal systems over ANR's, rigid embeddings and nonseparable absorbing sets
Piotr Niemiec
Most of results of Bestvina and Mogilski [\textit{Characterizing certain incomplete infinite-dimensional absolute retracts}, Michigan Math. J. \textbf{33} (1986), 291--313] on stro…
Spaces of measurable functions
Piotr Niemiec
For a metrizable space and a finite measure space let and be the spaces of all equivalence classes (under the relation of equality almo…
Extending maps by injective --maps in Hilbert manifolds
Piotr Niemiec
The aim of the paper is to prove that if is a metrizable manifold modelled on a Hilbert space of dimension and is its --set, then for every completel…
Functor of continuation in Hilbert cube and Hilbert space
Piotr Niemiec
A -set in a metric space is a closed subset of such that each map of the Hilbert cube into can uniformly be approximated by maps of into .…
A note on ANR's
Piotr Niemiec
It is shown that if for a complete metric space there is a constant such that the intersection of open balls is nonempty for every fin…
Universal valued Abelian groups
Piotr Niemiec
The counterparts of the Urysohn universal space in category of metric spaces and the Gurarii space in category of Banach spaces are constructed for separable valued Abelian groups…