Texas A&M University, Department of
Mathematics, 216 Milner Hall, 2nd of February 2005, 3:00-3:50
Groups and Dynamics Seminar
Embedding free
groups in branch groups
Said Sidki of Universidade de
Brasília,
Brazil
In a joint work with J. Wilson, we described a procedure for embedding
free groups of rank 2 in Branch groups. The procedure uses the
tree-wreathing operation by Brunner-Sidki, together with state-closed
(or self-similar) representation of the pre-Borel affine group
(Z^n)B(n,Z) by Nekrashevych-Sidki.