论文标题
多层奴才的反射和力量
Reflections and powers of multisorted minions
论文作者
论文摘要
从关系的角度考虑了在扩展，反射和直接功能下关闭的多层奴才类别的类别。作为Barto，Opršal和Pinsker的结果的概括，以多层关系对的结构为角度来表征多层奴才的闭合，这是奴才不变的。
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.
