Reflections and powers of multisorted minions

Erkko Lehtonen, Reinhard Pöschel

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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.

Original languageEnglish
Article number20
JournalAlgebra Universalis
Issue number2
Publication statusPublished - May 2021


  • Coreflection
  • Minion
  • Minor-closed class
  • Multisorted algebra
  • Reflection


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