On the triangle conjecture. (English) Zbl 0487.68074


68T99 Artificial intelligence
94A45 Prefix, length-variable, comma-free codes
20M05 Free semigroups, generators and relations, word problems
20M35 Semigroups in automata theory, linguistics, etc.
Full Text: DOI


[1] Hansel, G., Baïonnettes et cardinaux, Discrete Math., 39, 331-335 (1982) · Zbl 0486.20032
[2] Perrin, D.; Schützenberger, M. P., Un problème élémentaire de la théorie de l’information, Coll. Internat. du CNRS no. 276. Coll. Internat. du CNRS no. 276, Théorie de I’Information, 249-260 (1977) · Zbl 0483.94028
[3] Perrin, D.; Schützenberger, M. P., A conjecture on sets of differences of integer pairs, Bulletin EATCS. Bulletin EATCS, J. Combin. Theory Ser. B, 30, 91-93 (1981) · Zbl 0468.05033
[4] Pin, J. E.; Simon, I., A note on the triangle conjecture, J. Combin. Theory Ser. A, 32, 106-109 (1982) · Zbl 0472.05010
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