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semigroup

美['semaɪˌgruːp] 英['semɪgruːp]

n. 半群组

The latter two published a monograph on semigroup theory in 1961. 后面二人在 1961 年出版了半群理论的专论。
A construction theorem for such semigroup is obtained. 给出该类半群的一个构造定理.
It follows that every nonempty periodic semigroup has at least one idempotent. 得出了所有非空周期半群都有至少一个幂等元。
A semigroup generated by a single element is said to be monogenic (or cyclic ). 被一个单一元素生成的半群叫做单基因的(或循环的)。
The minimal ideal of a commutative semigroup, when it exists, is a group. 交换半群的极小理想如果存在的话是个群。
A semigroup is said to be periodic if all of its elements are of finite order. 半群被称为周期性的，如果所有它的元素有着有限次序。

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