Groups with Largely Splitting Automorphisms of Orders Three and Four |
| |
Authors: | N. Yu. Makarenko E. I. Khukhro |
| |
Affiliation: | (1) Akademika Koptyuga Prospekt, 4, Institute of Mathematics SB RAS, Novosibirsk, 630090, Russia |
| |
Abstract: | A subset X of a group G is said to be large (on the left) if, for any finite set of elements g1,l... ,gkin G, an intersection of the subsets giX=gimid x in X is not empty, that is, limits{i=1}{k}giX . It is proved that a group in which elements of order 3 form a large subset is in fact of exponent 3. This result follows from the more general theorem on groups with a largely splitting automorphism of order 3, thus answering a question posed by Jaber amd Wagner in [1]. For groups with a largely splitting automorphism of order 4, it is shown that if His a normal -invariant soluble subgroup of derived length d then the derived subgroup [H,H] is nilpotent of class bounded in terms of d. The special case where =1 yields the same result for groups that are largely of exponent 4. |
| |
Keywords: | group large subset largely splitting automorphism |
本文献已被 SpringerLink 等数据库收录! |
|