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The state complexity of the star of union of an m-state DFA language and an n-state DFA language is proved to be 2m+n-1-2m-1-2 n-1+1 for every alphabet of at least two letters. The state complexity of the star of intersection is established as 3/4 2mn for every alphabet of six or more letters. This improves the recent results of A. Salomaa, K. Salomaa and Yu ("State complexity of combined operations", Theoret. Comput. Sci., 383 (2007) 140-152).
Original language | English |
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Pages (from-to) | 161-178 |
Number of pages | 18 |
Journal | Fundamenta Informaticae |
Volume | 109 |
Issue number | 2 |
DOIs | |
State | Published - 16 Sep 2011 |
ID: 41140645