no. 2
D0L sequence equivalence is in P for fixed alphabets
RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications, Tome 42 (2008) no. 2, pp. 361-374.

A new algorithm is presented for the D0L sequence equivalence problem which, when the alphabets are fixed, works in time polynomial in the rest of the input data. The algorithm uses a polynomial encoding of words and certain well-known properties of ℤ-rational sequences.

DOI : 10.1051/ita:2007037
Classification : 68Q45
Mots clés : D0L system, equivalence problem, polynomial-time algorithm 
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     author = {Ruohonen, Keijo},
     title = {D0L sequence equivalence is in $P$ for fixed alphabets},
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Ruohonen, Keijo. D0L sequence equivalence is in $P$ for fixed alphabets. RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications, Tome 42 (2008) no. 2, pp. 361-374. doi : 10.1051/ita:2007037. http://archive.numdam.org/articles/10.1051/ita:2007037/

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