Plenary Speakers

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Hee Oh Professor of Mathematics The Mathematics Department, Brown University Ph.D, Yale University, 1997 B.Sc., Seoul National University 1992 Professor, Brown University, July 2006present Professor, California Institute of Technology, April 2006August 2007 Associate Professor with tenure, California Institute of Technology, June 2003March 2006 Assistant Professor, Princeton University, Sep 1999June 2003 Golda Meir Postdoctoral Fellow, The Hebrew University, Oct 1998June 1999 Visiting Assistant Professor, Oklahoma State University, Aug 1997May 1998  Plenary Lecture  1  10:0010:50, December 16 (Wed), 2009 Speaker : Hee Oh (Brown University) 
Chair : Georgia Benkart (University of Wisconsin) 
Counting circles and Ergodic theory of Kleinian groups 
There are many interesting examples of Kleinian groups whose limit sets on the unit sphere provide circle packings. For instance, one can obtain Sierpinski curves or Apollonian gaskets in this way. Given such a circle packing on the unit sphere, we discuss how the ergodic theory of Kleinian groups can be used to answer the question "How many circles are of radius at least r as r tends to 0?" 


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Terence Tao Professor of Mathematics The Department of Mathematics, UCLA Ph. D., Princeton University, 1996 M. Sc., Flinders University, 1992 B. Sc., (Hons), Flinders University, 1991 Honourary Professor, ANU, 20012003 Full Professor, UCLA, 2000present Visiting Professor, UNSW, 2000 CMI Longterm Prize Fellow, Clay Mathematical Institute, 20012003 Assistant Professor, UCLA, 2000 Visiting Fellow UNSW, 1999 Acting Assistant Professor, UCLA, 1999 Member, MSRI, Fall 1997 Hedrick Assistant Professor, UCLA, 19961998 Assistant Researcher, Princeton University, 19931994 Assistant Researcher, Flinders Medical Centre, 19921994 Terence Tao was born in Adelaide, Australia in 1975. Tao's areas of research include harmonic analysis, PDE, combinatorics, and number theory. He has received a number of awards, including the Salem Prize in 2000, the Bochner Prize in 2002, the Fields Medal and SASTRA Ramanujan Prize in 2006, the MacArthur Fellowship and Ostrowski Prize in 2007, and the Waterman Award in 2008. Terence Tao also currently holds the James and Carol Collins chair in mathematics at UCLA, and is a Fellow of the Royal Society, the Australian Academy of Sciences (Corresponding Member), the National Academy of Sciences (Foreign member), and the American Academy of Arts and Sciences.  Plenary Lecture  2  11:0011:50, December 16 (Wed), 2009 Speaker : Terence Tao (University of California, Los Angeles) 
Chair : Kyewon Koh Park (Ajou University) 
The proof of the Poincaré conjecture 
In a series of three terse papers in 2003 and 2004, Grisha Perelman made spectacular advances in the theory of the Ricci flow on 3manifolds, leading in particular to his celebrated proof of the Poincare conjecture (and most of the proof of the more general geometrization conjecture). Remarkably, while the Poincare conjecture is a purely topological statement, the proof is almost entirely analytic in nature, in particular relying on nonlinear PDE tools together with estimates from Riemannian geometry to establish the result. In this talk we discuss some of the ingredients used in the proof, and sketch a highlevel outline of the argument. 


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Bumsig Kim Professor of Mathematics School of Mathematics, Korea Institute for Advanced Study Ph. D., in Mathematics, University of California at Berkeley, 1996 B. S., in Mathematics, Seoul National University 1989 Professor, Korea Institute for Advanced Study, 2003present Associate Professor, Pohang University of Science and Technology, 20012003 Assistant Professor, Pohang University of Science and Technology, 19992001 Visiting Research Assistant Professor, University of California at Davis, 19971999 Postdoctoral Fellow, MittagLeffler Institute, 19961997  Plenary Lecture  3  11:0011:50, December 17 (Thur), 2009 Speaker : Bumsig Kim (Korea Institute for Advanced Study) 
Chair : Yong Seung Cho (Ewha Womans University) 
Stable quasimaps to GIT quotients 
A virtually smooth algebraic stack generalizes the notion of an algebraic manifold and is still good enough to do geometry. In particular, the constructions of moduli spaces as stacks are much easier and even more desired. I will show some examples, including one which I wanted for a long time. The latter is joint work with CiocanFontanine and Maulik. 


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YoungJu Choie Professor of Mathematics Department of Mathematics, Pohang University of Science and Technology Ph. D., Temple University, PA, 1986 B. S., EwhaWoman's University, 1982 Visiting Professor, Stanford University, Palo Alto, CA, USA, 2005 Visiting scholar, University of Cambridge, England, 1995 Professor, POSTECH, Korea, 1990present Assistant Professor, University of Colorado, Boulder, U.S.A., 19891990 Visiting Assistant Professor, University of Maryland, U.S.A., 19881990 Lecturer, Ohio State University, Columbus, U.S.A., 19861988  Plenary Lecture  4  13:3014:20, December 17 (Thur), 2009 Speaker : YoungJu Choie (Pohang University of Science and Technology) 
Chair : MyungHwan Kim (Seoul National University) 
Not quite modular 
Counting branched coverings of Riemann surfaces, fixing base surface and a ramification type, is called the Hurwitz problem. It turns out that the generating functions of counting branched coverings with various ramification types have a quasimodular property. These are spaces of functions not quite modular, but still have various arithmetic properties. Mock modular forms, Eichler integrals and Quasimodular forms are such examples. We show that there is a systematic way to study such a generating function, namely, a quasimodular form. The parallel theories, such as Hecke operator, Lfunctions and connection with various forms, similar to those of modular forms can be developed. It turns out that this space is isomorphic to that of the vector valued forms with symmetric power representations. 


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James McKernan NorbertWiener Professor of Mathematics Massachusetts Institute of Technology James McKernan was born in London, England in 1964. He received his BA in mathematics from Cambridge University in 1985, whilst attending Trinity College, and his PhD in mathematics from Harvard University under the supervision of Joseph Harris in 1991. He then held temporary positions at the University of Utah, 19911993, University of Texas, at Austin 19931994, and Oklahoma State University, Stillwater 19941995. He joined the faculty at the University of California, Santa Barbara in 1995 and the faculty at Massachusetts Institute of Technology in 2007, where he is NorbertWiener Professor of Mathematics. In 2007 he received a Clay Research award and in 2009 the Cole Prize in Algebra. His research interests are in algebraic geometry, especially birational geometry and the classification of algebraic varieties.  Plenary Lecture  5  11:0011:50, December 19 (Sat), 2009 Speaker : James McKernan (Massachusetts Institute of Technology) 
Chair : Sijong Kwak (Korea Advanced Institute of Science and Technology) 
Finite Generation of the Canonical ring 
Given any smooth projective variety the canonial ring is the ring of all global holomorphic differential forms. In this talk I will explain the geometric significance of the canonical ring and the fact that this ring is finitely generated. 


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Van Vu Professor of Mathematics Mathematics Department, Rutgers University
Ph. D., Yale University, 1998 B. S., Eotvos Univerisity (Budapest, Hungary), 1994
Professor II, Department of Mathematics, Rutgers University, July 2009present Full Professor, Department of Mathematics, Rutgers University, September 2005June 2009 Leader of Focus program "Arithmetic Combinatorics", Institute for Advance Study, Fall 2007 Visiting Professor, Institute Henry Poincare (Paris, France), June 2006July 2006 Full Professor, Department of Mathematics, UCSD, July 2005December 2005 Associate Professor, Department of Mathematics, UCSD, July 2003June 2005 Assistant Professor, Department of Mathematics, UCSD, July 2001 June 2003 Postdoc Researcher, Theory group, Microsoft Research, June 1999June 2001 Member, Institute for Advance Study, Princeton University, September 1998June 1999
 Plenary Lecture  6  13:3014:20, December 19 (Sat), 2009 Speaker : Van Vu (Rutgers University) 
Chair : Jeong Han Kim (National Institute For Mathematical Science) 
From the LittlewoodOfford problem to the Circular Law conjecture 
The famous Circular Law in random matrix theory asserts that if M_n is an n by n matrix with iid entries of mean zero and variance one, then the empirical spectral distribution (after a proper normalization) tends to the uniform distribution on the unit disk. This is usually seen as the nonhermitian "brother" of the classical Wigner semicircle law. After a long sequence of partial results that verified the law under various extra assumptions, the Circular Law is now known to be true in its mot general form, due to a result of Tao and Vu (2008). In this talk, we discuss a few main ideas of the proof, in particular recent advances in understanding the LittlewoodOfford problem in combinatorics. 


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Kiahm Lee Tenured Associate Professor of Mathematics Department of Mathematics, Seoul National University Ph. D. in mathematics, Courant Institute, New York University, September '93 September '98 University of Texas at Austin, Fall ¡¯97 Summer ¡¯98 B. A. in Mathematics, Seoul National University, March '88February '92
Tenured Associate Professor, Seoul National University, February '06present Adjunct Assistant, University of Texas at Austin, January '05August '05 Assistant Professor, Seoul National University, December '01February '06 Instructor, University of Texas at Austin, Fall '00Fall '01 Visiting Assistant Professor, University of California at Irvine, Fall '98Spring '00  Plenary Lecture  7  10:4011:30, December 20 (Sun), 2009 Speaker : Kiahm Lee (Seoul National University) 
Chair : Minkyu Kwak (Chonnam National University) 
Nonlinear Elliptic and Parabolic Equations: Analysis and Applications 
In this talk, let us introduce the important issues in the secondorder nonlinear elliptic and parabolic equations of divergence type and nondivergence type. First, we will consider degenerate equations where the degeneracy of the diffusion coefficient will give us nontrivial balance between the second derivatives and requires nontrivial understanding on the concept of derivatives and its estimate. Another interesting class of nonlinear equation is nonlocal partial differential equations like fractional Laplace operator. The operator is given as an integral of second differential quotients with a singular weight function, where two points away from each other has stronger interaction than standard diffusion. So the kernel has thicker tail than that of standard local equations. Finally, we will consider the difficulties and applications when the data is highly oscillating or domain has hole like a perforated domains. We are going to discuss how to filter the oscillation of solutions caused by the oscillation of data or domain, and to prove the effective equation describes different averaging on each problem. 


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Minhyong Kim Professor of Pure Mathematics Department of Mathematics, University College London Ph. D. in Mathematics, Yale University, 19851990 B. S. in Mathematics, Seoul National University, 19821985 Professor of Pure Mathematics, University College London, 2007present Professor, Purdue University, 20052007 Professor, University of Arizona, 20042007 Professor, Korea Institute for Advanced Study, 20012002 Associate Professor, University of Arizona, 19982003 Assistant Professor, University of Arizona, 19951998 J.F. Ritt Assistant Professor, Columbia University, 19931996 C. L. E. Moore Instructor, Massachusetts Institute of Technology, 19901993  Plenary Lecture  8  11:4012:30, December 20 (Sun), 2009 Speaker : Minhyong Kim (University College London) 
Chair : JaeHyun Yang (Inha University) 
Diophantine geometry and Galois Theory 
In his manuscripts from the 1980's Grothendieck proposed ideas that have been interpreted variously as embedding the theory of schemes into either 
group theory and higherdimensional generalizations; 
or homotopy theory. 
It was suggested, moreover, that such a framework would have profound implications for the study of Diophantine problems. In this talk, we will discuss mostly the little bit of progress made on this last point using some mildly nonabelian motives associated to hyperbolic curves. 
Public Lecturer
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Frank Morgan Webster Atwell ¡®21 Professor of Mathematics Department of Mathematics and Statistics, Williams College
PhD, Princeton University, 1977 MA, Princeton University, 1976 SB, MIT, 1974
Webster Atwell ¡®21 Professor of Mathematics, Williams College, 2003present Dennis Meenan ¡®54 Third Century Professor of Mathematics, Williams College, 19972003 ScD (honorary), Cedar Crest College, 1995 Chair, Williams College, 198894 Cecil and Ida Green Career Development Chair, MIT, 198586 Chairman, Undergraduate Mathematics Office, MIT, 197982 C.L.E. Moore Instructor, MIT, 197779
 Public Lecture  18:0018:50, December 16 (Wed), 2009 Speaker : Frank Morgan (Williams College) Chair : Jaigyoung Choe (Korea Institute for Advanced Study) From Soap Bubbles to the Poincaré Conjecture A round soap bubble provides the leastperimeter way to enclose a given volume of air, as was conjectured by the Ancient Greeks and proved mathematically by Schwarz in 1884. Similarly the double bubble that forms when two soap bubbles come together provides the leastperimeter way to enclose and separate two given volumes of air, although that was not proved until 2002 by Hutchings, Morgan, Ritoré, and Ros. Such "isoperimetric" theorems have played any important role throughout mathematics, including Perelman's 2003 proof of the Poincaré Conjecture. The talk will include soap bubble demonstrations, recent results by undergraduates, and open questions. 
