R. Pöschel

activity

20122026

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Showing 2023 · math.RAShow all

2 papers · 2 filters

math.RA2023

$S$ -preclones and the Galois connection $^{S} Pol$ - $^{S} Inv$ , Part I

Peter Jipsen, Erkko Lehtonen, Reinhard Pöschel

We consider $S$ -operations $f : A^{n} \to A$ in which each argument is assigned a signum $s \in S$ representing a "property" such as being order-preserving or order-reversing…

math.RA2023

Generalized Quasiorders and the Galois Connection End-gQuord

Danica Jakubíková-Studenovská, Reinhard Pöschel, Sándor Radeleczki

Equivalence relations or, more general, quasiorders (i.e., reflexive and transitive binary relations) $ρ$ have the property that an $n$ -ary operation $f$ preserves $ρ$ , i.e., $f$ i…

S-preclones and the Galois connection SPol-SInv, Part I

Generalized Quasiorders and the Galois Connection End-gQuord

$S$ -preclones and the Galois connection $^{S} Pol$ - $^{S} Inv$ , Part I