A class of regular *-semigroups.
Extensions of homomorphisms to dense extensions of semigroups.
Completely regular semigroups as semigroups of partial transformations.
Not all fundamental 0-bisimple inverse semigroups contain charts.
Corrigendum to "Operators and products in the lattice of existence varieties of regular semigroups".
Operators and products in the lattice of existence varieties of regular semigroups.
Generalized varieties of commutative and nilpotent semigroups.
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