In: Tatra Mountains Mathematical Publications, vol. 46, no. 2
Andrzej Nowik
Detaily:
Rok, strany: 2010, 41 - 45
Kľúčové slová:
density topology, nowhere dense sets, meager sets, ideal of sets, porous sets.
O článku:
For any topologies
$\tau_1 \subseteq \tau_2$,
we consider the ideal
of sets $A$ such that for each nonempty
$U \in \tau_2$
there exists
$W \in \tau_1$
such that
$U \cap W \not= \emptyset$
and
$A \cap U \cap W = \emptyset$.
For
$\tau_1$, the standard Euclidean topology,
and for
$\tau_2$, the density topology, we obtain the ideal
${\mathit{(a)}}$
investigated
by Z. Grande and E. Strońska.
Ako citovať:
ISO 690:
Nowik, A. 2010. Notes on the ideal ${\mathit{(a)}}$. In Tatra Mountains Mathematical Publications, vol. 46, no.2, pp. 41-45. 1210-3195.
APA:
Nowik, A. (2010). Notes on the ideal ${\mathit{(a)}}$. Tatra Mountains Mathematical Publications, 46(2), 41-45. 1210-3195.