Locally nilpotent groups with a centralizer of finite rank

1992 ◽  
Vol 44 (11) ◽  
pp. 1390-1394 ◽  
Author(s):  
V. A. Onishchuk
1984 ◽  
Vol 27 (4) ◽  
pp. 485-489
Author(s):  
A. H. Rhemtulla ◽  
H. Smith

AbstractA group G is said to have the FINITE INDEX property (G is an FI-group) if, whenever H≤G, xp ∈ H for some x in G and p > 0, then |〈H, x〉: H| is finite. Following a brief discussion of some locally nilpotent groups with this property, it is shown that torsion-free solvable groups of finite rank which have the isolator property are FI-groups. It is deduced from this that a finitely generated torsion-free solvable group has an FI-subgroup of finite index if and only if it has finite rank.


2015 ◽  
Vol 182 (2) ◽  
pp. 289-298 ◽  
Author(s):  
Gustavo A. Fernández-Alcober ◽  
Leire Legarreta ◽  
Antonio Tortora ◽  
Maria Tota

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