...-classes in ....-unipotent Semigroups.
*-Congruences on regular *-semigroups.
(Cyclic) subgroup separability of HNN and split extensions
...-Groups that are M-Groups.
(I.P.S.) Ipergruppi di ordine 6
-многообразия без независимого базиса тождеств. II.
...-length of union of groups semigroups.
(Pre)order preserving additive homomorphisms of (pre)ordered commutative semigroups into real numbers
ℳ-rank and meager groups
Assume p* is a meager type in a superstable theory T. We investigate definability properties of p*-closure. We prove that if T has countable models then the multiplicity rank ℳ of every type p is finite. We improve Saffe’s conjecture.
...-Ringstrukturen auf dem Burnsidering der Permutationsdarstellungen einer endlichen Gruppe.
.....-simple reflective semigroups.
*-Simple type A ...-semigroups.
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A regular hypersubstitution is a mapping which takes every -ary operation symbol to an -ary term. A variety is called regular-solid if it contains all algebras derived by regular hypersubstitutions. We determine the greatest regular-solid variety of semigroups. This result will be used to give a new proof for the equational description of the greatest solid variety of semigroups. We show that every variety of semigroups which is finitely based by hyperidentities is also finitely based by identities....
«Wave packets» sur les groupes nilpotents