Combinatorics on words
SIS
Exam topics for 2017/2018
Lecture notes (some in Czech, will be gradually replaced with English versions)
Commuting and conjugate words
Words with more periods
The paper by Fine and Wilf
Unbordered words and (local) periods
The theorem of Lyndon and Schützenberger
Large system with minimal defect
Principal solutions
Subsemigroups and the Graph lemma