On the star-height of subword counting languages and their relationship to Rees zero-matrix semigroups
نویسندگان
چکیده
منابع مشابه
On the star-height of subword counting languages and their relationship to Rees zero-matrix semigroups
Given a word w over a finite alphabet, we consider, in three special cases, the generalised star-height of the languages in which w occurs as a contiguous subword (factor) an exact number of times and of the languages in which w occurs as a contiguous subword modulo a fixed number, and prove that in each case it is at most one. We use these combinatorial results to show that any language recogn...
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ژورنال
عنوان ژورنال: Theoretical Computer Science
سال: 2016
ISSN: 0304-3975
DOI: 10.1016/j.tcs.2016.09.024