Bound-decreasing duplication system

Da Jung Cho, Yo Sub Han, Hwee Kim

Research output: Contribution to journalArticle

2 Citations (Scopus)


We introduce the bound-decreasing duplication operation, a new variant of tandem duplication operation, that has restrictions on the position and the maximum size of the duplication segment in a target string. Then, we examine the bound-decreasing duplication system that iteratively generates strings from an initial string using the bound-decreasing duplication operation. We show that there exists a nondeterministic finite-state automaton (NFA) accepting all strings generated by the bound-decreasing duplication system when an initial input is a single string; in other words, the bound-decreasing duplication system produces a regular language. This helps us to calculate the system capacity based on the corresponding NFA. Furthermore, we revisit a deduplication operation—a reverse process of duplication—on an NFA that transforms a given NFA to a smaller NFA while generating the same language by the string duplication system.

Original languageEnglish
Pages (from-to)152-168
Number of pages17
JournalTheoretical Computer Science
Publication statusPublished - 2019 Nov 12

All Science Journal Classification (ASJC) codes

  • Theoretical Computer Science
  • Computer Science(all)

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