Seonhee Lim

Ithaca, NY, 14853-4201

Work phone: (607) 255-7113, Fax: (607) 255-7149

E-mail: slim@math.cornell.edu

Dynamics of group actions on trees and buildings, more generally metric spaces of non-positive curvature
Entropy rigidity
Lattices of Lie groups and automorphism groups of trees and polyhedral complexes, commensurator subgroups, etc.

Volume entropy for buildings (joint work with F. Ledrappier), in preparation.
A proof of a L1/2 ergodic theorem (joint work with F. Ledrappier). pdf, ps (2006.12)
Counting overlattices for polyhedral complexes (joint work with A. Thomas), submitted for publication. abstract ps pdf (2006.5, revised 2007.11)
Covering theory for complexes of groups (joint work with A. Thomas), to appear in J. Pure Appl. Algebra. abstract, arxiv (2006.5, revised 2007. 9)
Minimal volume entropy for graphs, Trans. Amer. Math. Soc. 360 (2008), 5089-5100. abstract, pdf, ps (2005.6)
Counting overlattices in automorphism groups of trees, Geom. Dedicata, Vol. 118, no. 1, pp. 1-21. abstract, pdf, ps (2004.6, revised 2005.10)

AIM Workshop: Volume Entropy Rigidity, Zurich (June 2009).
AMS Western Section Meeting, Special Session on Recent Progress in Geometric Group Theory, San Francisco (April 2009) (Session associated to the invited address of K. Vogtmann).

Minicourse on Graphs of Groups and Complexes of Groups, Univ. of Neuchatel, Switzerland (June 2, 9, 16, 23, 2008)
Geometry and Dynamics Seminar, Ecole Normale Superieure de Lyon, France (June 18, 2008)
Conference on Analysis, Geometry and Dynamics on Groups, Neuchatel, Switzerland (June 13, 2008)
Conference on Discrete Groups and Geometric Structures with Applications, Kortrijk, Belgium (May 29, 2008)
Dynamics Seminar, Northwestern University (May 13, 2008)
AMS Spring Eastern Sectional Meeting, Special Session on Geometric Topology, Courant Institute (Mar. 15-16, 2008)
Topology and Geometric Group Theory Seminar, Cornell University (Feb. 26, 2008)
Geometry and Topology Seminar, SUNY Buffalo (Feb. 22, 2008)
Geometry and Topology Seminar, Binghamton University (February 21, 2008)
Geometric Group Theory Seminar for Postdocs, MSRI (October 3, 2007)
Geometry Seminar, University of Notre Dame (September 27, 2007)
Seoul National University Algebra Summer Camp (4 talks, August, 2007)
Number Theory Seminar, KIAS, Seoul, Korea (August, 2007).
Geometry Seminar, KIAS, Seoul, Korea (2 talks, July, 2007)
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