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Palindromic length of infinite aperiodic words

Combinatorics 2025-09-16 v2 Discrete Mathematics

Abstract

The palindromic length of the finite word vv is equal to the minimal number of palindromes whose concatenation is equal to vv. It was conjectured in 2013 that for every infinite aperiodic word xx, the palindromic length of its factors is not bounded. We prove this conjecture to be true.

Keywords

Cite

@article{arxiv.2410.12714,
  title  = {Palindromic length of infinite aperiodic words},
  author = {Josef Rukavicka},
  journal= {arXiv preprint arXiv:2410.12714},
  year   = {2025}
}