Algebraic dimension of semigroups with application to invariant measures.
Algebraic monoids with a dense group of units.
Algebraic monoids with group kernels.
Algebraic theory of finite semigroups
Algebras of multiplace functions.
Algebras, prerings, semirings and rectangular bands.
Algèbres de demigroupes, quotients d'algebres de demigroupes finis.
All completely regular elements in
In Universal Algebra, identities are used to classify algebras into collections, called varieties and hyperidentities are use to classify varieties into collections, called hypervarities. The concept of a hypersubstitution is a tool to study hyperidentities and hypervarieties. Generalized hypersubstitutions and strong identities generalize the concepts of a hypersubstitution and of a hyperidentity, respectively. The set of all generalized hypersubstitutions forms a monoid. In...
All subvarieties of a certain variety of semigroups.
All varieties of bands.
All varieties of orthogroups.
Almost set-theoretic complete intersections in characteristic zero.
We present a class of toric varieties V which, over any algebraically closed field of characteristic zero, are defined by codim V +1 binomial equations.
Amalgams of free inverse semigroups.
Amenability properties of Figà-Talamanca-Herz algebras on inverse semigroups
This paper continues the joint work with A. R. Medghalchi (2012) and the author’s recent work (2015). For an inverse semigroup S, it is shown that has a bounded approximate identity if and only if l¹(S) is amenable (a generalization of Leptin’s theorem) and that A(S), the Fourier algebra of S, is operator amenable if and only if l¹(S) is amenable (a generalization of Ruan’s theorem).
An addition theorem for finite semigroups.
An algebraic characterization of multiplicative semigroups of real valued functions.
An algebraic proof of Isbell' s zigzag theorem.
An algebraic treatment of flow diagrams and its application to generalized recursion theory
An analogue of Litoff's Theorem.
An application of the theory of isosceles (ultrametric) spaces to the Trnková-Vinárek theorem