Countable Hausdorff spaces with countable weight
Counting with groups and rings.
Covering in the set of principal ideals in the semigroup of binary relations.
Co-volume methods for degenerate parabolic problems.
Critical theories of varieties of semigroups satisfying a permutation identity.
Crossability of cancellative Kleene semigroups
Crossed semimodules and Schreier internal categories in the category of monoids.
Cyclic subsemigroups of symmetric inverse semigroups.
Decidability of complexity one-half for finite semigroups.
Decidability of equational theories of coverings of semigroup varieties.
Decidability of periodicity for infinite words
Decomposition and complexity of finite semigroups.
Decomposition of a locally associative LA-semigroup.
Decomposition of commutative ordered semigroups into archimedean components.
Decomposition of regular subsemigroup lattices.
Decomposition of rings under the circle operation.
Decomposition series of a certain semigroup
Decompositions of semigroups induced by identities.
Decompositions of semigroups with zero.
Definability in the lattice of equational theories of semigroups.