We first prove an extremal property of the infinite Fibonacci word : the family of the palindromic prefixes of is not only a circular code but “almost” a comma-free one (see Prop. 12 in Sect. 4). We also extend to a more general situation the notion of a necklace introduced for the study of trinucleotides codes on the genetic alphabet, and we present a hierarchy relating two important classes of codes, the comma-free codes and the circular ones.
@article{ITA_2008__42_4_717_0, author = {Pirillo, Giuseppe}, title = {A hierarchy for circular codes}, journal = {RAIRO - Theoretical Informatics and Applications - Informatique Th\'eorique et Applications}, volume = {42}, year = {2008}, pages = {717-728}, doi = {10.1051/ita:2008002}, mrnumber = {2458703}, zbl = {1155.68069}, language = {en}, url = {http://dml.mathdoc.fr/item/ITA_2008__42_4_717_0} }
Pirillo, Giuseppe. A hierarchy for circular codes. RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications, Tome 42 (2008) pp. 717-728. doi : 10.1051/ita:2008002. http://gdmltest.u-ga.fr/item/ITA_2008__42_4_717_0/
[1] A complementary circular code in the protein coding genes. J. Theor. Biol. 182 (1996) 45-58.
and ,[2] A circular code in the protein coding genes of mitochondria. J. Theor. Biol. 189 (1997) 273-290.
and ,[3] Mots de Fibonacci. Séminaire d'informatique théorique. LITP, Paris (1980-81) 57-78.
,[4] Theory of codes. Academic Press (1985). | MR 797069 | Zbl 0587.68066
and ,[5] Sturmian words, in Algebraic Combinatorics on words, edited by M. Lothaire. Cambridge University Press (2002). | MR 1905123
and ,[6] Codes without commas. Proc. Natl. Acad. Sci. USA 43 (1957) 416-421. | MR 86734
, and ,[7] A combinatorial property of the Fibonacci words. Inform. Process. Lett. 12 (1981) 193-195. | MR 632866 | Zbl 0468.20049
,[8] Sturmian words: structure, combinatorics, and their arithmetics. Theoret. Comput. Sci. 183 (1997) 45-82. | MR 1468450 | Zbl 0911.68098
,[9] Palindromes in the Fibonacci word. Inform. Process Lett. 55 (1995) 217-221. | MR 1351896 | Zbl 1004.68537
,[10] On some factorizations of infinite words by elements of codes. Inform. Process. Lett. 62 (1997) 289-294. | MR 1463344
and ,[11] On cube-free -words generated by binary morphism. Discrete Appl. Math. 5 (1983) 279-297. | MR 690339 | Zbl 0505.03022
,[12] The Art of Computer Programming. Addison-Wesley, Reading, Mass. (1968). | MR 378456 | Zbl 1127.68068
,[13] Fast pattern matching in strings. SIAM J. Comput. 6 (1977) 323-350. | MR 451916 | Zbl 0372.68005
, and ,[14] Combinatorics on words. Addison-Wesley (1983). | MR 675953 | Zbl 0514.20045
,[15] Varieties of comma-free codes. Comput. Math. Appl. (in press). | Zbl 1195.92022 | Zbl pre05288062
, and ,[16] Repetitions in the Fibonacci infinite word. RAIRO-Theor. Inf. Appl. 26 (1992) 199-204. | Numdam | MR 1170322 | Zbl 0761.68078
and ,[17] Infinite words and biprefix codes. Inform. Process Lett. 50 293-295 (1994). | MR 1286606 | Zbl 0810.68108
,[18] Fibonacci numbers and words. Discrete Math. 173 (1997) 197-207. | MR 1468849 | Zbl 0882.68113
,[19] Some factorizations of the Fibonacci word. Algebra Colloquium 6 (1999) 361-368. | MR 1809671 | Zbl 1167.68416
,[20] A characterization for a set of trinucleotides to be a circular code, In Determinism, Holism, and Complexity, edited by C. Pellegrini, P. Cerrai, P. Freguglia, V. Benci and G. Israel. Kluwer (2003).
,[21] Growth function of self-complementary circular codes. Biology Forum 98 (2005) 97-110.
and ,[22] Propriétés combinatoires des mots infinis engendrés par certains morphismes. PhD. thesis, L.I.T.P., Paris. (1985).
,