Topological dynamical system: https://www.youtube.com/watch?v=HzR46AeIoaU

http://www.chaosbook.org/course1/Course2w9.html

http://www.mi.fu-berlin.de/math/groups/ag-logik/Lehre/UST-chapter09.pdf

book

Topological entropy – Symbolic dynamics

Topological trace formula