• TUCS Publication Series
• How to Publish in TUCS Series
• Publication Search
• Publication Graph
• Publication Input
• Publication Input Guide
• JuFo Browser

Tiling Periodicity

Juhani Karhumäki, Yury Lifshits, Wojciech Rytter, Tiling Periodicity. Discrete Mathematics & Theoretical Computer Science 12(2), 237-248, 2010.

Abstract:

We contribute to combinatorics and algorithmics of words by introducing new types of periodicities in words. A tiling period of a word w is partial word u such that w can be decomposed into several disjoint parallel copies of u, e.g. a ⋄ b is a tiling period of aabb. We investigate properties of tiling periodicities and design an algorithm working in O(n log(n) log log(n)) time which finds a tiling period of minimal size, the number of such periods and their compact representation. The combinatorics of tiling periods differs significantly from that for classical full periods, for example unlike the classical case the same word can have many different primitive tiling periods. We consider also a related new type of periods called in the paper multi-periods. As a side product of the paper we solve an open problem posted by T. Harju.

BibTeX entry:

@ARTICLE{jKaLiRy10a,
  title = {Tiling Periodicity},
  author = {Karhumäki, Juhani and Lifshits, Yury and Rytter, Wojciech},
  journal = {Discrete Mathematics & Theoretical Computer Science},
  volume = {12},
  number = {2},
  pages = {237-248},
  year = {2010},
}

Belongs to TUCS Research Unit(s): FUNDIM, Fundamentals of Computing and Discrete Mathematics

Edit publication