Kopytov, V. M.; Rachůnek, Jiří The greatest proper variety of \(m\)-groups. (Russian, English) Zbl 1062.08011 Algebra Logika 42, No. 5, 624-635 (2003); translation in Algebra Logic 42, No. 5, 349-355 (2003). It is proved that the variety of all normal-valued \(m\)-groups is the greatest proper subvariety in the lattice of all \(m\)-varieties. Reviewer: K. N. Ponomarev (Novosibirsk) Cited in 1 Document MSC: 08B15 Lattices of varieties 06F15 Ordered groups Keywords:variety; \(m\)-group; semiordered group; group of monotonic transformations PDF BibTeX XML Cite \textit{V. M. Kopytov} and \textit{J. Rachůnek}, Algebra Logika 42, No. 5, 624--635 (2003; Zbl 1062.08011); translation in Algebra Logic 42, No. 5, 349--355 (2003)