Geodesic
The automorphism tower problem for free periodic groups
Proceedings of the Yerevan State University. Physical and mathematical sciences, no. 2 (2013), pp. 3-7.

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We prove that the group of automorphisms $Aut(B(m;n))$ of the free Burnside group $B(m;n)$ is complete for every odd exponent $n\geq 1003$ and for any $m > 1$, that is it has a trivial center and any automorphism of $Aut(B(m;n))$ is inner. Thus, the automorphism tower problem for groups $B(m;n)$ is solved and it is showed that it is as short as the automorphism tower of the absolutely free groups. Moreover, we obtain that the group of all inner automorphisms $Inn(B(m;n))$ is the unique normal subgroup in $Aut(B(m;n))$ among all its subgroups, which are isomorphic to free Burnside group $B(s;n)$ of some rank $s$.
Keywords: automorphism tower, complete group, free Burnside group. 
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V. S. Atabekyan. The automorphism tower problem for free periodic groups. Proceedings of the Yerevan State University. Physical and mathematical sciences, no. 2 (2013), pp. 3-7. http://geodesic.mathdoc.fr/item/UZERU_2013_2_a0/

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