Data compression: methods and theory
Data compression: methods and theory
Journal of the ACM (JACM)
Text algorithms
Rotations of periodic strings and short superstrings
Journal of Algorithms
Partial words and a theorem of Fine and Wilf
Theoretical Computer Science
A Generalization of Ogden's Lemma
Journal of the ACM (JACM)
Theory of Codes
Reconstructing strings from substrings in rounds
FOCS '95 Proceedings of the 36th Annual Symposium on Foundations of Computer Science
Partial words and the critical factorization theorem
Journal of Combinatorial Theory Series A
Discrete Applied Mathematics
Partial words and the critical factorization theorem revisited
Theoretical Computer Science
How Many Holes Can an Unbordered Partial Word Contain?
LATA '09 Proceedings of the 3rd International Conference on Language and Automata Theory and Applications
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An unbordered word is a string over a finite alphabet such that none of its proper prefixes is one of its suffixes. In this paper, we extend the results on unbordered words to unbordered partial words. Partial words are strings that may have a number of ''do not know'' symbols. We extend a result of Ehrenfeucht and Silberger which states that if a word u can be written as a concatenation of nonempty prefixes of a word v, then u can be written as a unique concatenation of nonempty unbordered prefixes of v. We study the properties of the longest unbordered prefix of a partial word, investigate the relationship between the minimal weak period of a partial word and the maximal length of its unbordered factors, and also investigate some of the properties of an unbordered partial word and how they relate to its critical factorizations (if any).