The largest proper congruence on S(X).
The largest proper regular ideal of
The Lattice automorphisms of simple algebraic groups over F2.
The lattice of congruences on a Baer-Levi semigroup.
The lattice of convex subgroupoids of an ordered groupoid.
The lattice of equational theories. Part I: Modular elements
The lattice of equational theories. Part III: Definability and automorphisms
The lattice of Fitting classes which are right extensible by soluble groups.
In this paper we study the set of Fitting classes which are right extensible by soluble groups ordered by the inclusion relation. The consideration of the associated lattices gives rise to new Fitting classes and it allows to obtain some injectivity criteria for general Fitting classes.
The lattice of R-unipotent congruences on a regular semigroup.
The lattice of semigroup varieties.
The lattice of solid -subgroups of a retractable group
The lattice of varieties and pseudovarieties of band monoids.
The lattice of varieties of *-regular band monoids.
The lattice of very-well-placed subgroups
The lattices and Möbius functions of stable closed subrootsystems and Hyperplane complements for classical Weyl Groups.
The least inverse and orthodox congruences on a completely regular semigroup.
The least semilattice of groups congruence on a regular semigroup.
The least semilattice of groups congruence on an eventually regular semigroup.
The least separative congruence on a weakly commutative semigroup
The length of a unitary transformation.