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An optimal test on finite unavoidable sets of words. (English) Zbl 0506.68057

68Q45 Formal languages and automata
20M35 Semigroups in automata theory, linguistics, etc.
Full Text: DOI
[1] Sch├╝tzenberger, M.P., On the synchronizing properties of certain prefix codes, Inform. and control, 7, 23-26, (1964) · Zbl 0122.15004
[2] Bean, D.R.; Ehrenfeucht, A.; McNulty, G.F., Avoidable patterns in strings of symbols, Pacific J. math., 85, 2, 261-294, (1979) · Zbl 0428.05001
[3] Hall, M., Combinatorial theory, (1967), BlaisDell Publishing Company · Zbl 0196.02401
[4] Lothaire, Combinatorics on words, (1982), Addison-Wesley Reading, MA · Zbl 1001.68093
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