A certain equivalence on a semigroup
Contribution to the foundations of network theory using the distribution theory, II
On representations of tolerance ordered commutative semigroups
Atomicity of tolerance lattices of commutative semigroups
Modularity and distributivity of tolerance lattices of commutative inverse semigroups
On tolerances on periodic semigroups
A characterization of semilattices of left or right groups
Note on homomorphisms of direct products of algebras
Tolerance distributive and tolerance Boolean varieties of semigroups
Modularity and distributivity of tolerance lattices of commutative separative semigroups
On weakly commutative semigroups
Tolerance distributive and tolerance modular varieties of commutative semigroups
On a certain relation for closure operation on a semigroup
Archimedean equivalence on ordered semigroups
Green's relations on a compact semigroup
A contribution to the foundations of network theory using the distribution theory
On permutability in semigroup varieties
The paper contains characterizations of semigroup varieties whose semigroups with one generator (two generators) are permutable. Here all varieties of regular -semigroups are described in which each semigroup with two generators is permutable.
A Relation for Closure Operations on a Semigroup
A Note on Classes of Regularity in Semigroups
Inverse semirings and their lattice of congruences
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