Seonhee Lim

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Assistant Professor

Department of Mathematics, Seoul National University

Kwanak-dong, Kwanak-ku, Seoul, 151-747

Office : 27- 212

Work phone: (82)2-880-4262

E-mail: slim@snu.ac.kr

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Teaching

Spring 2012 : Algebraic Topology II , Advanced Calculus I

Fall 2011 : Algebraic Topology I

Spring 2011 : Introduction to Lie groups, Calculus

More

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Research

Research Interest : geometric group theory & dynamics

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

Seminar

• Topology & Dynamics

Papers

• On the distribution of orbits of geometrically finite hyperbolic groups on the boundary (with Hee Oh), Ergod. Th. & Dynam. Sys., Vol 32, 173 - 189. online (published online on April 05, 2011)
• On Commensurizer Growth (joint work with Nir Avni and Eran Nevo), to appear in Israel J. Math. arxiv (2009.11)
• Volume entropy for hyperbolic buildings (joint work with F. Ledrappier), Journal of Modern dynamics, Volume 4, No. 1 (2010) page 139-165. arxiv (revised (improved to include all regular buildings) 2009.7)
• Counting overlattices for polyhedral complexes (joint work with A. Thomas), Topology Proceedings, Volume 36 (2010) page 229-247. pdf
• A proof of a L1/2 ergodic theorem (joint work with F. Ledrappier), preprint. pdf (2006.12)
• Covering theory for complexes of groups (joint work with A. Thomas), J. Pure Appl. Algebra 212 (2008) 1632--1663. arxiv
• Minimal volume entropy for graphs, Trans. Amer. Math. Soc. 360 (2008), 5089-5100. arxiv
• Counting overlattices in automorphism groups of trees, Geom. Dedicata, Vol. 118 (2006), no. 1, pp. 1-21. arxiv

Recent upcoming talks

• Special session on ergodic theory & dynamical systems, KMS spring meeting, Seoul, South Korea (April 28, 2012)
• Miniworkshop on geometry, KIAS, Seoul, South Korea (December 15, 2011)
• Mathematics Seminar, KIAS, Seoul, South Korea (December 1, 2011)
• Topology workshop, Jeonbuk National University, Korea (August 23-24, 2011)
• Invited talk, Geometric Topology Fair, KAIST, Korea (August 9-10, 2011)
• Invited talk, Topology session of KMS spring meeting, Seoul, Korea (April 30, 2011)
• Colloquium, Yonsei University, Seoul, South Korea (Oct. 14, 2010)
• Hyperbolic geometry and related topics, KIAS, Seoul, South Korea (Sep. 15, 2010)
• Vogtmannfest, CIRM, France (June 23,2010).
• Colloquium, Ajou University, Seoul, South Korea (May 14, 2010).
• Colloquium, Sogang University, Seoul, South Korea (May 7, 2010).
• Colloquium, POSTECH, Pohang, South Korea (April 2, 2010).
• Colloquium, Sookmyung Women's University, Seoul, South Korea (November 5, 2009).
• Colloquium, Seoul National University, Seoul, South Korea (October 6, 2009).
• Examples of Groups, Ohio State University, Columbus, OH (May 11-14, 2009).
• Cornell Topology Festival, Ithaca, NY (May 4, 2009).
• Workshop in rigidity, part of Cornell Topology Festival, Ithaca, NY (May 1, 2009).
• Joint Mathematics meeting, AMS Special Session on Group Actions on Homogeneous Spaces and Applications, Washington, D.C. (January 5, 2009)
• Colloquium, Korean Advanced Institute of Science and Technology, Daejeon, South Korea (December 10, 2008)
• Dynamics of Group Actions Seminar, Yale University (November 10, 2008)
• Summer School on Quasiconformal analysis and boundaries of hyperbolic groups, Bloomington, Indiana (August 14, 2008) (on the quasi-isometry rigidity result of Bourdon and Pajot, lecture notes)
• Geometry Seminar, University of Athens, Athens, Greece (August 4, 2008)
• Analysis and Geometry on Groups Seminar, University Paris 7, Paris, France (July 23, 2008)
• Geometry Seminar, ETH, Zurich, Switzerland (July 9, 2008)
• 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)
• more

Recent Conferences Organized

• First Joint International Meeting of the AMS and the Korean Mathematical Society, Seoul (December 16-20, 2009).

A special session in geometric group theory and low-dimensional topology (and Lie groups).

• 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).

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Links

• List of conferences in geometric group theory
• List of conferences in dynamical systems
• Problems in Geometric Group Theory

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