The groupoid of varieties of idempotent semigroups.
The groups of order at most 2000.
The growth functions of finitely generated semigroups.
The Grushko decomposition of a finite graph of finite rank free groups: an algorithm.
The Heart of Prime Ideals in Ore Extensions.
The hereditary pure monoids.
The holomorphic automorphism group of the complex disk.
The Homological Algebra of Artin Groups.
The homological dimension of a torsion-free abelian group of finite rank as a module over its ring of endomorphisms
The Homological Dimension of an Abelian Group as a Module over its Ring of Endomorphisms. III.
The Homological Dimension of an Abelian Group as a Module over Its Ring of Endomorphisms. II.
The homology of Peiffer products of groups.
The homology of special linear groups over polynomial rings
The homomorphic image of a T -semigroup.
The homomorphic images of infinite symmetric groups.
The Homotype Type of a Combinatorially Aspherical Presentation.
The hook fusion procedure.
The Hopf property and K-free products of semigroups.
The Hughes subgroup
Let be a group and a prime. The subgroup generated by the elements of order different from is called the Hughes subgroup for exponent . Hughes [3] made the following conjecture: if is non-trivial, its index in is at most . There are many articles that treat this problem. In the present Note we examine those of Strauss and Szekeres [9], which treats the case and arbitrary, and that of Hogan and Kappe [2] concerning the case when is metabelian, and arbitrary. A common proof is...
The Hurwitz action and braid group orderings.