Equational bases for weak monounary varieties
Grzegorz Bińczak (2002)
Discussiones Mathematicae - General Algebra and Applications
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It is well-known that every monounary variety of total algebras has one-element equational basis (see [5]). In my paper I prove that every monounary weak variety has at most 3-element equational basis. I give an example of monounary weak variety having 3-element equational basis, which has no 2-element equational basis.