Free inverse semigroups.
On the singular ideals of inverse semigroup algebras.
Embedding semigroups in congruence-free semigroups.
Nil right ideals in inverse semigroup algebras.
Two examples of inverse semigroups algebras.
On simple inverse semigroups.
Brown-McCoy semisimplicity of certain Banach algebras.
On the contracted -algebra of a polycyclic monoid.
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