Ballester-Bolinches, A.; Beidleman, J. C.; Esteban Romero, Ramón; Ragland, M. F.(Universitat Autonoma de Barcelona, 2016)
[EN] We call G a Hall_X -group if there exists a normal nilpotent subgroup N of G
for which G/N' is an X -group. We call G a T0 -group provided G/\Phi(G) is a T -group, that
is, one in which normality is a transitive ...