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Construction of finite commutative z-semigroups. (English) Zbl 0121.26903


Keywords:

group theory
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References:

[1] A. H. Clifford: Extensions of semigroups. Trans. Amer. Math. Soc, 68, 165-173 (1950). JSTOR: · Zbl 0037.01001 · doi:10.2307/1990439
[2] D. Rees: On semigroups. Proc. Cambridge Phil. Soc, 36, 387-400 (1940). · Zbl 0028.00401 · doi:10.1017/S0305004100017436
[3] T. Tamura: On finite one-idempotent semigroups (1). Jour. Gakugei Tokushima Univ., 4, 11-20 (1954). · Zbl 0057.01501
[4] T. Tamura: Note on finite semigroups and determination of semigroups of order 4. Jour. Gakugei Tokushima Univ., 5, 17-27 (1954). · Zbl 0058.01403
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