Two types of retract irreducibility of connected monounary algebras

Abstract: Let $\Cal A$ be a connected monounary algebra. The paper deals with retract irreducibility of $\Cal A$ in the class of all connected monounary algebras and in the class of all monounary algebras.

Keywords: monounary algebra, connected monounary algebra, retract, retract irreducibility

Classification (MSC91): 08A60

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