Dynamical Systems

Seminar for graduate/PhD students at the University of Warsaw and all researches interested in Dynamical Systems


Academic year 2021/22


Winter semester
Date
Speaker
Title
Abstract
8.10.2021

Presentation of the scope of the seminar, fixing programme for the winter semester

15.10.2021
Katarzyna Sarosiek
Iteration of rational maps examples


22.10.2021
29.10.2021
Joanna Horbaczewska Properties of the Julia set


5.11.2021
19.11.2021
Radosław Opoka
Dynamics of a holomorhic map near attracting/repelling fixed points

26.11.2021
Radosław Opoka
Dynamics of a holomorhic map near superattracting and parabolic fixed points

3.12.2021
Krzysztof Lech
Dynamics of a holomorhic map near irrationally neutral fixed points

10.12.2021
Rafał Tryniecki
Hausdorff dimension of sets with restricted, slowly growing partial quotients
I. J. Good (1941) showed that the set of irrational numbers in $(0,1)$ whose partial quotients tend to infinity is of Hausdorff dimension 1/2. A number of related results impose restrictions of the type $a_n \in B$ or $a_n \geq f(n)$, where $B$ is an infinite subset of $\mathbb{N}$ and $f$ is a function rapidly growing with $n$. We show that, for an arbitrary $B$ and an arbitrary $f$ with values in $[\min B, \infty)$ and tending to infinity, the set of irrational numbers in $(0, 1)$ such that $a_n \in B$, $a_n \leq f(n)$ for all $n \in \mathbb{N}$, and $a_n \to \infty$ as $n \to \infty$ is of Hausdorff dimension $\tau(B)/2$, where $\tau(B)$ is the exponent of convergence of $B$.
17.12.2021
Katarzyna Sarosiek
Newton's method

14.01.2022
Krzysztof Lech
Dynamics of a holomorphic map mear an irrationally neutral fixed point

21.01.2022
Joanna Horbaczewska
Dynamics of transcendental maps from class $\mathcal B$

28.01.2022


Summer semester
Date
Speaker
Title
Abstract
4.03.2022
Łukasz Pawelec
Elements of infinite ergodic theory

11.03.2022
Joanna Horbaczewska Dimension and measure of Julia sets of exponential maps

18.03.2022

25.03.2022
Radosław Opoka Indecomposable continua in exponential dynamics
1.04.2022
8.04.2021
22.04.2022
Rafał Tryniecki
Hausdorff measure for continued fraction expansions and piecewise-linear models

29.04.2022
Krzysztof Lech
Random holomorphic dynamics

4.05.2022
Joanna Horbaczewska
Indecomposable continua in exponential dynamics
13.05.2022
Joanna Horbaczewska
Indecomposable continua in exponential dynamics

20.05.2021
Krzysztof Lech
On iterates of $\exp(z)$

27.05.2022
Łukasz Pawelec
Borel-Cantelli sequences in dynamics

3.06.2022
Radosław Opoka
Hairs of the complex exponential family

10.06.2022

Summary of the seminar