Pełnotekstowe zasoby PLDML oraz innych baz dziedzinowych są już dostępne w nowej Bibliotece Nauki.
Zapraszamy na https://bibliotekanauki.pl
Preferencje help
Polish version English version Język
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 8

Liczba wyników na stronie
first rewind previous Strona / 1 next fast forward last

Wyniki wyszukiwania

help Sortuj według:

help Ogranicz wyniki do:
first rewind previous Strona / 1 next fast forward last
1
Content available remote

On some problem of A. Rosłanowski

100%
Plewik S.
Colloquium Mathematicum
|
1996
|
tom 69
|
nr 2
297-298
EN
We present a negative answer to problem 3.7(b) posed on page 193 of [2], where, in fact, A. Rosłanowski asked: Does every set of Lebesgue measure zero belong to some Mycielski ideal?
2
Content available remote

On metric σ-discrete spaces

64%
Plewik S., Walczyńska M.
Banach Center Publications
|
2016
|
tom 108
|
nr 1
239-253
EN
By studying dimensional types of metric scattered spaces, we consider the wider class of metric σ-discrete spaces. Applying techniques relevant to this wider class, we present new proofs of some embeddable properties of countable metric spaces in such a way that they can be generalized onto uncountable metric scattered spaces. Related topics are also explored, which gives a few new results.
3
Content available remote

Ideals which generalize (v 0)

64%
Kalemba P., Plewik S.
Open Mathematics
|
2010
|
tom 8
|
nr 6
1016-1025
EN
Countable products of finite discrete spaces with more than one point and ideals generated by Marczewski-Burstin bases (assigned to trimmed trees) are examined, using machinery of base tree in the sense of B. Balcar and P. Simon. Applying Kulpa-Szymanski Theorem, we prove that the covering number equals to the additivity or the additivity plus for each of the ideals considered.
4
Content available remote

Skeletally Dugundji spaces

51%
Kucharski A., Plewik S., Valov V.
Open Mathematics
|
2013
|
tom 11
|
nr 11
1949-1959
EN
We introduce and investigate the class of skeletally Dugundji spaces as a skeletal analogue of Dugundji space. Our main result states that the following conditions are equivalent for a given space X: (i) X is skeletally Dugundji; (ii) every compactification of X is co-absolute to a Dugundji space; (iii) every C*-embedding of the absolute p(X) in another space is strongly π-regular; (iv) X has a multiplicative lattice in the sense of Shchepin [Shchepin E.V., Topology of limit spaces with uncountable inverse spectra, Uspekhi Mat. Nauk, 1976, 31(5), 191–226 (in Russian)] consisting of skeletal maps.
5
Content available remote

On the ideal (v 0)

51%
Kalemba P., Plewik S., Wojciechowska A.
Open Mathematics
|
2008
|
tom 6
|
nr 2
218-227
EN
The σ-ideal (v 0) is associated with the Silver forcing, see [5]. Also, it constitutes the family of all completely doughnut null sets, see [9]. We introduce segment topologies to state some resemblances of (v 0) to the family of Ramsey null sets. To describe add(v 0) we adopt a proof of Base Matrix Lemma. Consistent results are stated, too. Halbeisen’s conjecture cov(v 0) = add(v 0) is confirmed under the hypothesis t = min{cf(c), r}. The hypothesis cov(v 0) = ω 1 implies that (v 0) has the ideal type (c, ω 1, c).
6
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

On subspaces of the Pixley-Roy example

32%
Plewik S.
Colloquium Mathematicum
|
1981
|
tom 44
|
nr 1
41-46
7
Content available remote

On completely Ramsey sets

26%
Plewik S.
Fundamenta Mathematicae
|
1987
|
tom 127
|
nr 2
127-132
8
Content available remote

Ideals of the second category

26%
Plewik S.
Fundamenta Mathematicae
|
1991
|
tom 138
|
nr 1
23-26
first rewind previous Strona / 1 next fast forward last
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.