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math.RA2019★ 4 cited
On associative operations on commutative integral domains
Erkko Lehtonen, Florian Starke
We describe the associative multilinear polynomial functions over commutative integral domains. This extends Marichal and Mathonet's result on infinite integral domains and provide…
math.RA2019
Graph quasivarieties
Erkko Lehtonen, Reinhard Pöschel
Introduced by C. R. Shallon in 1979, graph algebras establish a useful connection between graph theory and universal algebra. This makes it possible to investigate graph varieties…