Correction to my paper "On a type of matrix semigroup algebras" .
Counting with groups and rings.
Decomposition of rings under the circle operation.
E-free objects in E-variétés of inverse rings.
Extensions of Bauer's identical congruences
Faithful linear representations of bands.
Finiteness conditions for semigroup rings
Finiteness theorems for factorizations.
Generalized adjoint semigroups of a ring.
Higher order relations for a numerical semigroup
Identities of orthodox semigroup rings.
Identities of semigroup rings over semilattices of completely (O-)simple semigroups.
Inverse semigroup rings
Lattices of order ideals on ordered semigroups.
Left chain semigroups.
Linear semigroups with permutation properties.
Monoid rings that are firs.
It is well known that the monoid ring of the free product of a free group and a free monoid over a skew field is a fir. We give a proof of this fact that is more direct than the proof in the literature.
Monoids of languages admitting ring structures.
Necessary conditions for a semigroup to be an integral CRM-ring with identity.
Nil right ideals in inverse semigroup algebras.