Schreier-Zassenhaus theorem for algebras. I
Schreier-Zassenhaus theorem for algebras. II
Schützenberger groups of ...-classes in the semigroup of all binary relations on a set.
Schwache Teilbarkeitshalbgruppen.
Selfdistributive groupoids. Part D1: Left distributive semigroups
Selfdistributive grupoids, Part A2: Non-idempotent left distributive quasigroups
Semi-abelian monadic categories.
Semidirectly closed pseudovarieties of locally trivial semigroups.
Semigroup representations of medial groupoids
Semigroups and their lattice of congruences II.
Semigroups and their subsemigroup lattices.
Semigroups for which the continuum congruences form finite chains.
Semigroups of transformations restricted by an equivalence
Suppose σ is an equivalence on a set X and let E(X, σ) denote the semigroup (under composition) of all α: X → X such that σ ⊆ α ∘ α −1. Here we characterise Green’s relations and ideals in E(X, σ). This is analogous to recent work by Sullivan on K(V, W), the semigroup (under composition) of all linear transformations β of a vector space V such that W ⊆ ker β, where W is a fixed subspace of V.
Semigroups with A-semidistributive subsemigroup lattices.
Semigroups with idempotent powers, II: The lattices of equational subclasses of [(xy2 =xy] .
Semilattice decomposition of semigroups.
Semilattices of finite arithmetical algebras
Semimodularity and weak modularity in subalgebra lattices of completely simple semigroups.
Semi-primal clusters
Semiregularity of congruences implies congruence modularity at 0
We introduce a weakened form of regularity, the so called semiregularity, and we show that if every diagonal subalgebra of is semiregular then is congruence modular at 0.