A note on free subsemigroups with two generators
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- by E. K. Blum PDF
- Bull. Amer. Math. Soc. 71 (1965), 678-679
References
- P. M. Cohn, On subsemigroups of free semigroups, Proc. Amer. Math. Soc. 13 (1962), 347–351. MR 139680, DOI 10.1090/S0002-9939-1962-0139680-3 2. M. W. Curtis, On some commutative sets in a free monoid, Abstract 64T-203, Notices Amer. Math. Soc. 11 (1964), 250.
- E. S. Ljapin, Semigroups, Translations of Mathematical Monographs, Vol. 3, American Mathematical Society, Providence, R.I., 1963. MR 0167545, DOI 10.1090/mmono/003
- R. C. Lyndon and M. P. Schützenberger, The equation $a^{M}=b^{N}c^{P}$ in a free group, Michigan Math. J. 9 (1962), 289–298. MR 162838
Additional Information
- Journal: Bull. Amer. Math. Soc. 71 (1965), 678-679
- DOI: https://doi.org/10.1090/S0002-9904-1965-11395-7
- MathSciNet review: 0177046