Reflections and powers of multisorted minions
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Publication:6332564
DOI10.1007/S00012-020-00707-0arXiv2001.02931MaRDI QIDQ6332564
Erkko Lehtonen, Reinhard Pöschel
Publication date: 9 January 2020
Abstract: 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, Oprv{s}al, and Pinsker, the closure of a multisorted minion is characterized in terms of constructions on multisorted relation pairs which are invariant for minions.
Operations and polynomials in algebraic structures, primal algebras (08A40) Equational classes, universal algebra in model theory (03C05) Galois correspondences, closure operators (in relation to ordered sets) (06A15) Heterogeneous algebras (08A68)
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