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Cotygodniowe seminarium badawcze
Organizatorzy
- prof. dr hab. Witold Marciszewski
- prof. dr hab. Piotr Zakrzewski
Informacje
środy, 16:15 , sala: 5050Dziedziny badań
Lista referatów
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18 grudnia 2024 16:15
Damian Głodkowski (UW)
A small Boolean algebra that is Grothendieck but not Nikodym, part II (A small Boolean algebra that is Grothendieck but not Nikodym, part II)
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11 grudnia 2024 16:15
Damian Głodkowski (UW)
A small Boolean algebra that is Grothendieck but not Nikodym (A small Boolean algebra that is Grothendieck but not Nikodym)
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4 grudnia 2024 16:15
Tomasz Kochanek (UW)
When is the Szlenk derivation of a dual unit ball another ball? (When is the Szlenk derivation of a dual unit ball another ball?)
The Szlenk derivation of the dual unit ball of a Banach space is an analogue of the Cantor-Bendixson derivative, and the main ingredient in the definition of Szlenk index, a classical ordinal index with many …
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27 listopada 2024 16:15
Tomasz Weiss (Cardinal Stefan Wyszyński University in Warsaw)
Some remarks on subsets of R defined in terms of the translations of sets which belong to the four most common sigma ideals in R, part II
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20 listopada 2024 16:15
Tomasz Weiss (Cardinal Stefan Wyszyński University in Warsaw)
Some remarks on subsets of R defined in terms of the translations of sets which belong to the four most common sigma ideals in R
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13 listopada 2024 16:15
Grzegorz Plebanek (University of Wrocław)
On embeddings of measure algebras into quotients of P(\omega) (On embeddings of measure algebras into quotients of P(\omega))
We discuss results, due to D.H. Fremlin, on the subject indicated in the title. Those are closely related to so-called uniformly distributed sequences and other sequential properties in spaces of measures. Additional information can be …
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6 listopada 2024 16:15
Damian Sobota (Universität Wien, Kurt Gödel Research Center for Mathematical Logic)
On isometric embeddings of separable spaces C(L) in arbitrary spaces C(K) (On isometric embeddings of separable spaces C(L) in arbitrary spaces C(K))
Supplementing and expanding classical results, for compact spaces K and L, L metric, and their Banach spaces C(L) and C(K) of continuous real-valued functions, we provide several characterizations of the existence of isometric embeddings of …
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30 października 2024 16:15
Taras Banakh (Ivan Franko National University of Lviv and UJK Kielce)
Algebra and Geometry in Liners (Algebra and Geometry in Liners)
We shall discuss the interplay between algebra and geometry in (affine or projective) liners, and also present selected open problems in this fascinating field of mathematics. More information can be found in the book "Geometry …
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23 października 2024 16:15
Piotr Szewczak (Cardinal Stefan Wyszyński University in Warsaw)
Perfectly meager sets in the transitive sense and the Hurewicz property (Perfectly meager sets in the transitive sense and the Hurewicz property)
We work in the Cantor space with the usual group operation +. A set X is perfectly meager in the transitive sense if for any perfect set P there is an F-sigma set F containing …
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16 października 2024 16:15
ARKADY LEIDERMAN (Ben-Gurion University of the Negev, Beer Sheva)
ON UNIFORMLY CONTINUOUS SURJECTIONS BETWEEN Cp-SPACES OVER METRIZABLE SPACES
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9 października 2024 16:15
Maciej Korpalski (University of Wrocław)
Barely alternating real almost chains and extension operators for compact lines
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12 czerwca 2024 16:15
Tomasz Żuchowski (University of Wrocław)
The Nikodym property and filters on ω
An infinite Boolean algebra A is said to have the Nikodym property when every pointwise bounded sequence of measures on A is uniformly bounded. For a free filter F on ω we consider the space …
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5 czerwca 2024 16:15
Jan Kostrzon (Doctoral School of Exact and Natural Sciences UW)
Towards stratification of Sealing Theorems
Sealing Theorems are very strong generic absoluteness principles formulated by Hugh Woodin. Whether the strongest one of them follows from the existence of some large cardinal is an open problem, very important in inner model …
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22 maja 2024 16:15
Lyubomyr Zdomskyy (Technische Universit¨at Wien)
Countable spaces, realcompactness, and cardinal characteristics.
In this talk we shall analyze the realcompactness number of countable spaces. In particular, we plan to show that for a cardinal \kappa, there exists a countable Tychonoff space X without isolated points such that …
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15 maja 2024 16:15
Grzegorz Plebanek (University of Wrocław)
Complemented subspaces of C(K x L)
We prove that whenever K and L are non-scattered compacta then the Banach space C(K x L) contains a complemented copy of C[0,1]. This is joint work with Jakub Rondos and Damian Sobota.
