Geodesic
Medial modes and rectangular algebras
Commentationes Mathematicae Universitatis Carolinae, Tome 47 (2006) no. 1, pp. 21-34.

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Medial modes, a natural generalization of normal bands, were investigated by P\l onka. Rectangular algebras, a generalization of rectangular bands (diagonal modes) were investigated by Pöschel and Reichel. In this paper we show that each medial mode embeds as a subreduct into a semimodule over a certain ring, and that a similar theorem holds for each Lallement sum of cancellative modes over a medial mode. Similar results are obtained for rectangular algebras. The paper generalizes earlier results of A. Romanowska, J.D.H. Smith and A. Zamojska-Dzienio.
Classification : 03C05, 08A05, 08A40, 08C15, 16Y60
Keywords: modes (idempotent and entropic algebras); cancellative modes; sums of algebras; embeddings; semimodules over semirings; idempotent subreducts of semimodules 
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Zamojska-Dzienio, Anna. Medial modes and rectangular algebras. Commentationes Mathematicae Universitatis Carolinae, Tome 47 (2006) no. 1, pp. 21-34. http://geodesic.mathdoc.fr/item/CMUC_2006__47_1_a2/