On permutable N-groups
On Permutation Groups of Degree 2p.
On Permutation Groups of Prime Power Order.
On permutation properties in groups and semigroups.
On P-groups of Small Order
On p...-High Injectives.
On P-injective hulls of S-sets.
On p-irreducible S-subsets of an S-set.
On p-Local Abelian Groups with Decomposititon Bases.
On power commutative semigroups.
On pq-hyperelliptic Riemann surfaces
A compact Riemann surface X of genus g > 1 is said to be p-hyperelliptic if X admits a conformal involution ϱ, called a p-hyperelliptic involution, for which X/ϱ is an orbifold of genus p. If in addition X admits a q-hypereliptic involution then we say that X is pq-hyperelliptic. We give a necessary and sufficient condition on p,q and g for existence of a pq-hyperelliptic Riemann surface of genus g. Moreover we give some conditions under which p- and q-hyperelliptic involutions of a pq-hyperelliptic...
On presentations of Brauer-type monoids
We obtain presentations for the Brauer monoid, the partial analogue of the Brauer monoid, and for the greatest factorizable inverse submonoid of the dual symmetric inverse monoid. In all three cases we apply the same approach, based on the realization of all these monoids as Brauer-type monoids.
On presentations of finite p-groups.
On presentations of semigroup rings
Siano un ideale di un anello e una congruenza su un semigruppo . Consideriamo l'anello semigruppo come un'immagine omomorfa dell'anello semigruppo . Questo è fatto in tre passi: prima studiando l'anello semigruppo , poi e infine combinando i due casi speciali. In ciascun caso, determiniamo l'ideale che è il nucleo dell'omomorfismo in questione. I risultati corrispondenti per le -algebre, dove è un anello commutativo, possono essere facilmente dedotti. Alcuni raffinamenti, casi speciali...
On primary semigroups
On prime fuzzy bi-ideals in ternary semigroups
On Prime Ideals in Representation Rings.
On Primitive Permutation Groups Containing a Cycle.
On principal ideals of triply-generated telescopic semigroups.
On Products of Finite Nilpotent Groups.