Commutative semigroups whose proper subsemigroups are projective.
Commutative semigroups with almost transitive endomorphism semirings
Commutative semigroups with few fully invariant congruences I.
Commutative semigroups with few fully invariant congruences II.
Commutative semigroups with self-dual lattice of subsemigroups.
Commutative semi-primary semigroups
Commutative semi-primary -semigroups
Commutative zeropotent semigroups
Commutative zeropotent semigroups with few invariant congruences
Commutative semigroups satisfying the equation and having only two -invariant congruences for an automorphism group are considered. Some classes of these semigroups are characterized and some other examples are constructed.
Commutative zeropotent semigroups with few prime ideals
We construct an infinite commutative zeropotent semigroup with only two prime ideals.
Commutativity in groups presented by finite Church-Rosser Thue systems
Commutativity of Operators on the Lattice of Existence Varieties.
Compact connected semilattices without the fixed point property.
Compact normal bands of groups.
Compact semilattice quotients which separate idempotent J-classes.
Compact totally disconnected k-divisible semigroups.
Compactification and linearization of abstract dynamical systems
Compactifications of finite dimensional cones.
Compactness conditions for semigroups of linear maps.
Comparison of congruences on regular semigroups.