Organizatorzy

prof. dr hab. Witold Marciszewski
prof. dr hab. Piotr Zakrzewski

Informacje

środy, 16:15 , sala: 4050

Dziedziny badań

Topologia i teoria mnogości

Lista referatów

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 …
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 $\mathfrak{b}$. …
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 …
15 października 2014 16:15
Maciej Malicki (SGH)
Abelian pro-countable groups and orbit equivalence relations -part II
8 października 2014 16:15
Maciej Malicki (SGH)
Abelian pro-countable groups and orbit equivalence relations
4 czerwca 2014 16:15
Marcin Staniszewski (Doktorant UG)
Pointwise versus equal (quasi-normal) convergence via ideal)
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 …
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 …
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 …
23 kwietnia 2014 16:15
Aleksander Błaszczyk (University of Silesia)
Topological Representation of lattice homomorphisms (joint results with Wojciech Bielas)
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 …
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 …
2 kwietnia 2014 16:15
Maciej Malicki (SGH)
Automorphism groups of homogeneous metric structures and consequences of the existence of ample generics
26 marca 2014 16:15
Michal Doucha (IMPAN)
Some universal Polish groups and group structures on the Urysohn space - kontynuacja
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 …
12 marca 2014 16:15
Witold Marciszewski (Uniwersytet Warszawski)
Pewne techniki kombinatoryczne w badaniach operatorów przedlużania