Maximal unbordered factors of random strings

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  • Patrick Hagge Cording
  • Mathias Bæk Tejs Knudsen

A border of a string is a non-empty prefix of the string that is also a suffix of the string, and a string is unbordered if it has no border. Loptev, Kucherov, and Starikovskaya [CPM 2015] conjectured the following: If we pick a string of length n from a fixed alphabet uniformly at random, then the expected length of the maximal unbordered factor is n − O(1). We prove that this conjecture is true by proving that the expected value is in fact n−Θ(σ−1), where σ is the size of the alphabet. We discuss some of the consequences of this theorem.

Original languageEnglish
Title of host publicationString Processing and Information Retrieval : 23rd International Symposium, SPIRE 2016, Beppu, Japan, October 18-20, 2016, Proceedings
EditorsShunsuke Inenaga, Kunihiko Sadakane, Tetsuya Sakai
Number of pages4
PublisherSpringer
Publication date2016
Pages93-96
ISBN (Print)978-3-319-46048-2
ISBN (Electronic)978-3-319-46049-9
DOIs
Publication statusPublished - 2016
Event23rd International Symposium on String Processing and Information Retrieval - Beppu, Japan
Duration: 8 Oct 201620 Oct 2016
Conference number: 23

Conference

Conference23rd International Symposium on String Processing and Information Retrieval
Nummer23
LandJapan
ByBeppu
Periode08/10/201620/10/2016
SeriesLecture notes in computer science
Volume9954
ISSN0302-9743

ID: 172140283