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arXiv · 1712.01731

The minimal arity of near-unanimity polymorphisms

Libor Barto·Ondřej Draganov
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Abstract

Dmitriy Zhuk has proved that there exist relational structures which admit near-unanimity polymorphisms, but the minimum arity of such a polymorphism is large and almost matches the known upper bounds. We present a simplified and explicit construction of such structures and a detailed, self-contained proof.

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Libor Barto, Ondřej Draganov. 2017-12-05. The minimal arity of near-unanimity polymorphisms. https://doi.org/10.1515/ms-2017-0223

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