On semigroups with least generating sets.
On semisimple bands.
On some systems of equations with constraints in a free group. – Addenda. (Sur certains systèmes d'équations avec constraintes dans un groupe libre. – Addenda.)
On some systems of equations with constraints in a free group. (Sur certains systèmes d'équations avec contraintes dans un groupe libre.)
On spectra of solvability and attainability for varieties of semigroups.
On the axiomatic rank of varieties generated by a semigroup or monoid with one defining relation.
On the classes of orderable semigroups in varieties.
On the congruence extension property.
On the finite basis property for semigroup varieties.
On the lattice of completely regular monoid varieties.
On the lattice of varieties of completely simple semigroups.
On the membership problem for pseudo-varieties of commutative semigroups.
On the Pin-Thérien expansion of idempotent monoids.
On the power semigroup of a finite semigroup
On the quasivarieties generated by finite semigroups.
On the varieties of Cliffordian Semigroups.
On the varieties of completely regular semigroups.
On the word problem for free bands of groups and for free objects in some other varieties of completely regular semigroups.
On two classes of hereditarily finitely based semigroup identities.
On universality of semigroup varieties
A category is called -determined if every set of non-isomorphic -objects such that their endomorphism monoids are isomorphic has a cardinality less than . A quasivariety is called -universal if the lattice of all subquasivarieties of any quasivariety of finite type is a homomorphic image of a sublattice of the lattice of all subquasivarieties of . We say that a variety is var-relatively alg-universal if there exists a proper subvariety of such that homomorphisms of whose image does...