On the rarity of quasinormal subgroups
On the recognizability of some projective general linear groups by the prime graph
Let be a finite group. The prime graph of is a simple graph whose vertex set is and two distinct vertices and are joined by an edge if and only if has an element of order . A group is called -recognizable by prime graph if there exist exactly nonisomorphic groups satisfying the condition . A 1-recognizable group is usually called a recognizable group. In this problem, it was proved that is recognizable, if is an odd prime and is odd. But for even , only the recognizability...
On the reflection representation in Springer's theory.
On the Regge symmetries of the symbols of
On the regular Sylow -subgroups of Chevalley groups over .
On the regularity of group algebras
On the relations between abstract and geometrical equivalence of abstract objects
On the relations between the central factor-module and the derived submodule in modules over group rings
A modular analogue of the well-known group theoretical result about finiteness of the derived subgroup in a group with a finite factor by its center has been obtained.
On the representation of abstract semigroups by transformation semigroups : Computer investigations.
On the representation of lattices by subsemigroup lattices of bands.
On the representation theory of braid groups
This work presents an approach towards the representation theory of the braid groups . We focus on finite-dimensional representations over the field of Laurent series which can be obtained from representations of infinitesimal braids, with the help of Drinfeld associators. We set a dictionary between representation-theoretic properties of these two structures, and tools to describe the representations thus obtained. We give an explanation for the frequent apparition of unitary structures on classical...
On the representations of GL (2). II. ...-factors of the representations of GL(2) x GL(2).
On the representations of GL(2). I. E-factors and n-closeness.
On the residual properties of link groups.
On the resolvability of Hall triple systems
È ben noto che fra le classi di sistemi ternari di Hall (HTS), gli HTS Abeliani ammettano una risoluzione siccome sono esattamente gli spazi affini finiti d'ordine 3; per questi sistemi una tal risoluzione è fornita dalla relazione di parallelismo. In questa nota viene dimostrato che certe classi di HTS non Abeliani costrutti dai gruppi di Burnside , anche ammettono una risoluzione. Allora, questi esempi di HTS si possono considerare anche come spazi finiti di Sperner e dunque la nota conclude...
On the right action hierarchy of semigroups
On the rings on torsion-free groups
On the saturated numerical semigroups
In this study, we characterize all families of saturated numerical semigroups with multiplicity four. We also present some results about invariants of these semigroups.
On the Schur Indices of Characters of GL (2, q) and GL (3, q).
On the Schur Multipliers of Steinberg and Chevalley Groups over Commutative Rings.