Classes of multisorted minions closed under extensions, reflections, and direct powers are considered from a relational point of view. As a generalization of a result of Barto, Opršal, and Pinsker, the closure of a multisorted minion is characterized in terms of constructions on multisorted relation pairs which are invariant for minions.

中文翻译：

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多元奴才的思考和力量

从关系的角度考虑了在扩展，反射和直接权力下封闭的多类奴才的类别。作为Barto，Opršal和Pinsker的结果的概括，多分类奴才的闭包的特征在于对多个变量不变的多分类关系对上的构造。