AbstractA solid variety is a variety in which every identity holds as a hyperidentity, that is, we substitute not only elements for the variables but also term operations for the operational symbols. There are obvious necessary conditions for a variety of semigroups to be solid. We will show here that these conditions are also sufficient
summary:Completely regular semigroups equipped with the unary operation of inversion within their ma...
The variety of guarded semigroups consists of all (S, ·, ) where (S, ·) is a semigrou
AbstractAn existence variety (or e-variety) of regular semigroups is a class of regular semigroups w...
summary:Pre-hyperidentities generalize the concept of a hyperidentity. A variety $V$ is said to be p...
A variety of semirings is said to be solid if each of its identities is satisfied as hyperidentity. ...
summary:Pre-hyperidentities generalize the concept of a hyperidentity. A variety $V$ is said to be p...
summary:Pre-hyperidentities generalize the concept of a hyperidentity. A variety $V$ is said to be p...
AbstractThere are exactly three non-trivial solid varieties of semirings, the variety of all rectang...
AbstractA solid variety is a variety in which every identity holds as a hyperidentity, that is, we s...
We show that many important varieties and sets of varieties of semigroups may be defined by relative...
Let A2 be the variety generated by the five-element non-orthodox 0-simple semigroup. This paper pres...
Let A2 be the variety generated by the five-element non-orthodox 0-simple semigroup. This paper pres...
In this article we introduce the concept of a generalised existence variety of regular semigroups. T...
Abstract. We consider the identities of a variety of semigroup-related algebras modeling the algebra...
ni → A. Partial operations occur in the algebraic description of partial recursive functions and Tu...
summary:Completely regular semigroups equipped with the unary operation of inversion within their ma...
The variety of guarded semigroups consists of all (S, ·, ) where (S, ·) is a semigrou
AbstractAn existence variety (or e-variety) of regular semigroups is a class of regular semigroups w...
summary:Pre-hyperidentities generalize the concept of a hyperidentity. A variety $V$ is said to be p...
A variety of semirings is said to be solid if each of its identities is satisfied as hyperidentity. ...
summary:Pre-hyperidentities generalize the concept of a hyperidentity. A variety $V$ is said to be p...
summary:Pre-hyperidentities generalize the concept of a hyperidentity. A variety $V$ is said to be p...
AbstractThere are exactly three non-trivial solid varieties of semirings, the variety of all rectang...
AbstractA solid variety is a variety in which every identity holds as a hyperidentity, that is, we s...
We show that many important varieties and sets of varieties of semigroups may be defined by relative...
Let A2 be the variety generated by the five-element non-orthodox 0-simple semigroup. This paper pres...
Let A2 be the variety generated by the five-element non-orthodox 0-simple semigroup. This paper pres...
In this article we introduce the concept of a generalised existence variety of regular semigroups. T...
Abstract. We consider the identities of a variety of semigroup-related algebras modeling the algebra...
ni → A. Partial operations occur in the algebraic description of partial recursive functions and Tu...
summary:Completely regular semigroups equipped with the unary operation of inversion within their ma...
The variety of guarded semigroups consists of all (S, ·, ) where (S, ·) is a semigrou
AbstractAn existence variety (or e-variety) of regular semigroups is a class of regular semigroups w...
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