[Binghamton Geometry/Topology Seminar] Remaining Talks (today and tomorrow)

[Lucas Sabalka]

                  BINGHAMTON GEOMETRY/TOPOLOGY SEMINAR

The room for the third talk of the week has been finalized:  LN-2201. See
also the abstract below.


*Date:*  *Wednesday*, March 30, 2011
*Time:*  *3:30-4:30pm*
*Place:*  Library North 2205 preceded by coffee/tea in the Anderson Reading
Room.
*Speaker:*  Collin Bleak (St. Andrews)
*Title:*  Minimal nonsolvable subgroups of F

*Abstract:*  In previous work, we showed that every non-solvable subgroup of
F contains a copy of a particular, countably generated (and not finitely
generated!) non-solvable subgroup W.  In turn, W contains copies of every
solvable subgroup of F.  In this talk, we consider what happens for finitely
generated non-solvable subgroups of F.  We show that a particular,
2-generated, non-solvable group B (as in, `Brin's group B') has the property
that every finitely generated non-solvable subgroup of F has a copy of B
within it.

*
Date:*  Thursday, March 31, 2011
*Time:*  2:50-3:50pm
*Place:*  Library North 2205 followed by coffee/tea in the Anderson Reading
Room.
*Speaker:*  Chris Cashen (U Utah)
*Title:*  Line Patterns in Free Groups

*Abstract:* Consider a collection of closed curves in a finite graph. The
universal cover of the graph is a tree, and the lifts of the closed curves
make a pattern of lines in this tree. I will discuss when it is possible to
match up two such line patterns with a quasi-isometriy of the tree.


*
Date:*  *Friday*, April 1, 2011
*Time:*  *3:30-4:30pm*
*Place:*  Library North 2201 preceded by coffee/tea in the Anderson Reading
Room.
*Speaker:*  Collin Bleak (St. Andrews)
*Title:*  On the Automorphisms of Thompson's Group V_n

*Abstract:*  We use a theorem of Grigorchuk and Nekrashevych, and some
automata theory (and if desired, even some basic analysis) to show that the
outer automorphism group of the generalized Thompson group V_n is S_n, the
symmetric group on n letters.  We also describe some likely consequences of
this result.  Joint with Lanoue, Maissel, and Navas.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://www1.math.binghamton.edu/pipermail/topsem/attachments/20110331/acc1c6e3/attachment.html