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Mostrando ítems 1-11 de 11

A Bishop-Phelps-Bollobas Type Theorem for uniform algegras

Cascales, B.; Guirao Sánchez, Antonio José; Kadets, V. (Elsevier, 2013-06-20)

This paper is devoted to showing that Asplund operators with range in a uniform Banach algebra have the Bishop¿Phelps¿Bollobas property, i.e., they are approximated by norm attaining Asplund operators at the same time ...
A Survey on Sylow Normalizers and Classes of Groups

D'Aniello, A.; Kazarin, L.S.; Martínez Pastor, Ana; Perez Ramos, Maria Dolores (HIKARI Ltd, 2014)

We report on a stream of research in relation with Sylow normalizers, i.e. normalizers of Sylow subgroups, of finite groups and group’s classes.
Finite trifactorized groups and pi-decomposability

Kazarin, L. S.; Martínez-Pastor, Ana; Perez Ramos, Maria Dolores (Cambridge University Press, 2018)
On conditional permutability and factorized groups

Arroyo Jordá, Milagros; Arroyo Jordá, Paz; Martínez Pastor, Ana; Perez Ramos, Maria Dolores (Springer Verlag (Germany), 2014-08)

Two subgroups and of a group are said to be totally completely conditionally permutable (tcc-permutable) if permutes with for some , for all and all . In this paper, we study finite products of tcc-permutable subgroups, ...
On finite groups with square-free conjugacy class sizes

Felipe, María José; Martínez Pastor, Ana; Sotomayor, Víctor (University of Isfahan, 2018)

[EN] We report on fi nite groups having square-free conjugacy class sizes, in particular in the framework of factorised groups.
On subgroups of ZJ type of an F-injector for fitting classes between Ep*p and Ep*Gp

Martínez Pastor, Ana (Universitat Autònoma de Barcelona, 1994)

[EN] Let G be a finite group and p a prime . We consider an 1-injectar K of G, being 1 a Fitting class between ~p* p and ~P* ep, and we study the structure and normality in G of the subgroups ZJ(K) and ZJ* (K),provided ...
On Sylow normalizers of finite groups

Kazarin, Lev; Martínez Pastor, Ana; Perez Ramos, Maria Dolores (World Scientific Publishing, 2014-05)

[EN] The paper considers the influence of Sylow normalizers, i.e. normalizers of Sylow subgroups, on the structure of finite groups. In the universe of finite soluble groups it is known that classes of groups with nilpotent ...
On the product of two π-decomposable groups

Kazarin, L. S.; Martínez Pastor, Ana; Perez Ramos, Maria Dolores (European Mathematical Society-Publishing House, 2015)

[EN] The aim of this paper is to prove the following result: let π be a set of odd primes. If the finite group G = AB is a product of two π-decomposable subgroups A = Oπ(A)×Oπ (A) and B = Oπ(B)×Oπ (B), then Oπ(A)Oπ(B)=Oπ(B)Oπ(A) ...
Prefactorized subgroups in pairwise mutually permutable products

Ballester-Bolinches, A.; Beidleman, JC; Heineken, H; Pedraza Aguilera, María Carmen (Springer Verlag, 2013-12)

We continue here our study of pairwise mutually and pairwise totally permutable products. We are looking for subgroups of the product in which the given factorization induces a factorization of the subgroup. In the case ...
Prime power indices in factorised groups

Felipe Román, María Josefa; Martínez-Pastor, Ana; Sotomayor, Víctor (Springer-Verlag, 2017)

[EN] Let the group G = AB be the product of the subgroups A and B. We determine some structural properties of G when the p-elements in A. B have prime power indices in G, for some prime p. More generally, we also consider ...
Square-free class sizes in products of groups

Felipe, María José; Martínez Pastor, Ana; Sotomayor, Víctor (Elsevier, 2017)

[EN] We obtain some structural properties of a factorised group G = AB, given that the conjugacy class sizes of certain elements in A boolean OR B are not divisible by p(2), for some prime p. The case when G = AB is a ...