## Lokalne aspekty entropii i chaosu dyskretnych układów dynamicznych

##### Abstract

In this paper we analyze local aspects of (nonautonomous) dynamical systems
of continuous self-functions. We describe a local complexity and unpredictability
of such systems.
Basic definitions, symbols and theorems useful in this paper are included in
Chapter 1.
In Chapter 2 we introduce the new definition of a point that accumulates entropy,
which was inspired by a known definition of the focal entropy point. Then we
analyze relations between some periodic dynamical system and the autonomous
dynamical system that was generated by the previous one. We formulate the conclusion
from these analysis as Theorem 39. We also study points focusing entropy
and how they are connected with other types of points like wandering points. In
Theorem 43 we approximate functions by functions from special equivalence class
to get some specific result.
In Chapter 3 we explore relations between points focusing entropy, chaos and
distributional chaos. We formulate Theorem 55 in which we compare four types of
dynamical systems, depending on having (or not) points listed above. We proved
that some specific families of dynamical systems are dense in the space of dynamical
systems defined on Il.
The Last Chapter is connected with semigroups and distortions. We based our
research on the definition of a point strongly focusing entropy of finite family of
functions.

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