Tight semigroups.

Bogdanović, Stojan; Ćirić, Miroslav

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Displaying similar documents to “Tight semigroups.”

Subtraction semigroups

Bohdan Zelinka (1995)

Mathematica Bohemica

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A subtraction semigroup is a semigroup $(A, ., -)$ with a further operation " $-$ " added, called subtraction and satisfying certain axioms. The paper concerns a problem by B. M. Schein concerning the structure of multiplication in a subtraction semigroup.