A simple construction of semigroups all of whose subsemigroups are left ideals.
A simple matrix semigroup which is not completely simple.
A simple proof for a theorem of chase
A simple proof of Baer;s and Sato's theorems on lattice-isomorphisms between groups
A simple proof is given of a well-known result of the existance of lattice-isomorphisms between locally nilpotent quaternionfree modular groups and abelian groups.
A simple proof of Vinogradov’s theorem on the orderability of the free product of -groups
A simplification of D'Alarcao's idempotent separating extensions of inverse semigroups.
A Single Groupoid Identity for Steiner Loops
A sketch of the lattice of commutative nilpotent semigroup varieties.
A solvability criterion for finite groups related to character degrees
Let be a fixed positive integer. In this paper, we consider finite groups each of whose nonlinear character degrees has exactly prime divisors. We show that such groups are solvable whenever . Moreover, we prove that if is a non-solvable group with this property, then and is an extension of or by a solvable group.
A Specht module analog for the rook monoid.
A special congruence lattice of a regular semigroup.
A Specialization Theorem for Certain Weyl Group Representations and an Application to the Green Polynomials of Unitary Groups.
A spelling theorem for staggered generalized 2-complexes, with applications.
A split exact sequence of Mackey functors.
A splitting criterion for Abelian groups
A splitting principle for group representations.
A splitting theorem for linear polycyclic groups.
A stability property for coefficients in Kronecker products of complex characters.
A Stiefel complex for the orthogonal group of a field.
A Strengthened Freiheitssatz.