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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19 listopada 2014 16:15
Michał Korch (doktorant UW)
The class of perfectly null sets and its transitive version
The ideals of universally null sets (UN, sets which are null with respect to any Borel diffused measure) and perfectly meager sets (PM, sets which are meager when restricted to any perfect set) are best …
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5 listopada 2014 16:15
Marcin Szyszkowski (Uniwersytet Gdański)
On axial functions
A function f : X × Y → X × Y is axial if it is of one of two types:f(x, y) = (g(x, y), y) for some g : X × Y → X …
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29 października 2014 16:15
Rafał Filipów (Uniwersytet Gdański)
Yet another ideal version of the bounding number b
We give a sufficient and necessary condition when the ideal pointwise convergence implies the ideal equal (aka quasi-normal) convergence. The characterization is expressed in terms of a cardinal coefficient related to the bounding number $\mathfrak{b}$. …
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22 października 2014 16:15
Taras Banakh (Lviv National University and UJK Kielce)
A characterization of Tychonoff spaces with applications to paratopological groups
We prove that a regular topological space $X$ is Tychonoff if and only if its topology is generated by a quasi-uniformity $\U$ such that for every $U\in\U$ and $A\subset X$ there is $V\in\U$ such that …
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15 października 2014 16:15
Maciej Malicki (SGH)
Abelian pro-countable groups and orbit equivalence relations -part II
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8 października 2014 16:15
Maciej Malicki (SGH)
Abelian pro-countable groups and orbit equivalence relations
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28 maja 2014 16:15
Wiesław Kubiś (Jan Kochanowski University in Kielce and Mathematical Institute of the Czech Academy of Sciences)
Katetov functors; joint work with Dragan Masulovic (Novi Sad)
We shall describe a natural method for constructing Fraisse limits by iterating a special functor F such that F(X) realizes all possible ``simple" extensions of the model X in a fixed class, usually consisting of …
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21 maja 2014 16:15
Mikołaj Krupski (Doktorant IMPAN)
On a certain ordering on continuous functions
K.P. Hart, T. Kania and T. Kochanek introduced a certain ordering on a space C(K) (of continuous real-valued functions on a compact space) and investigated spaces K for which C(K) does not have uncountable chains …
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7 maja 2014 16:15
Damian Sobota (doktorant UWr)
Countable tightness in the space of regular probability measures
During my lecture I would like to focus on the following problem from the boundary of measure theory and set-theoretical topology. Let K be a compact Hausdorff space. Assume that the space P(K) of all …
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23 kwietnia 2014 16:15
Aleksander Błaszczyk (University of Silesia)
Topological Representation of lattice homomorphisms
Wallman proved that if L is a distributive lattice with 0 and 1, then there is a T 1 -space with a base (for closed subsets) being a homomorphic image of L . We show …
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9 kwietnia 2014 16:30
Grzegorz Plebanek (University of Wroclaw)
Lattices of weakly compact sets in separable Banach spaces
We consider the lattice K(X) of weakly compact sets in a separable Banach space equipped with the relations of `almost inclusion'. The concept originated in the notion od Strongly Weakly Compactly Generated spaces. It turns …
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2 kwietnia 2014 16:15
Maciej Malicki (SGH)
Automorphism groups of homogeneous metric structures and consequences of the existence of ample generics
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26 marca 2014 16:15
Michal Doucha (IMPAN)
Some universal Polish groups and group structures on the Urysohn space - kontynuacja
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19 marca 2014 16:15
Michal Doucha (IMPAN)
Some universal Polish groups and group structures on the Urysohn space
I will present a construction of a metrically universal abelian separable metric group, i.e., every other separable abelian metric group embeds by an isometric monomorphism. This answers the question and extends the results of Shkarin …