Title
Combinatorics of minimal absent words for a sliding window
Abstract
A string w is called a minimal absent word (MAW) for another string T if w does not occur in T but the proper substrings of w occur in T. For example, let Σ={a,b,c} be the alphabet. Then, the set of MAWs for string w=abaab is {aaa,aaba,bab,bb,c}. In this paper, we study combinatorial properties of MAWs in the sliding window model, namely, how the set of MAWs changes when a sliding window of fixed length d is shifted over the input string T of length n, where 1≤d<n. We present tight upper and lower bounds on the maximum number of changes in the set of MAWs for a sliding window over T, both in the cases of general alphabets and binary alphabets. Our bounds improve on the previously known best bounds [Crochemore et al., 2020].
Year
DOI
Venue
2022
10.1016/j.tcs.2022.06.002
Theoretical Computer Science
Keywords
DocType
Volume
Combinatorics on words,Minimal absent words,Sliding window
Journal
927
ISSN
Citations 
PageRank 
0304-3975
0
0.34
References 
Authors
4
7
Name
Order
Citations
PageRank
Tooru Akagi100.34
Yuki Kuhara200.34
Takuya Mieno301.01
Yuto Nakashima401.35
Shunsuke Inenaga559579.02
Hideo Bannai662079.87
Masayuki Takeda7913.78