A necessary and suff. cient condition for the semidirect prod-uct of two semigroups are give which are a right adequate semigroup.
给出了两个一般半群的半直积是右适当半群的充要条件。
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This thesis is mainly devoted to study an abundant semigroup with a quasi-adequate transversal.
本文主要研究具有拟恰当断面的富足半群。
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