YITWAH CHEUNG - Mathematics - San Francisco State University

Department of Mathematics
San Francisco State University
San Francisco, CA 94132
EDUCATION
YITWAH CHEUNG
2000 Ph.D. in Mathematics, University of Illinois at Chicago
Thesis Advisor: Howard Masur
1997 M.S. in Mathematics, University of Illinois at Chicago
Phone: (415) 338-1805
Fax: (415) 338-1461
E-mail: ycheung@sfsu.edu
1995 B.S. in Mathematics and Physics, Massachusetts Institute of Technology
PROFESSIONAL EXPERIENCE
2010 San Francisco State University, Associate Professor
2005 San Francisco State University, Assistant Professor
2000 Northwestern University, Boas Visiting Assistant Professor
1995 University of Illinois at Chicago, Teaching Assistant
HONORS AND AWARDS
NSF CAREER Award DMS-0956209 (Analysis), 2010-2015, $400,000.
NSF Research Grant DMS-0701281 (Analysis), 2007-2010, $101,045.
Mini Grant, San Francisco State University, 2006-07, $5,000.
Mini Grant, San Francisco State University, 2005-06, $5,000.
Liftoff Mathematician, Clay Mathematics Institute, 2000, $12,000.
RESEARCH INTERESTS
Ergodic theory, rational billiards, dynamics on Lie groups, Diophantine approximation
SELECTED PUBLICATIONS
1. Hausdorff dimension of the set of Singular Pairs, Annals of Mathematics, 173 (2011),
127–167.

2. (with P. Hubert, H. Masur) Dichotomy for the Hausdorff dimension of the set of
nonergodic directions, Inventiones, 183, (2011), 337–383.
3. Hausdorff dimension of the set of points on divergent trajectories of a homogeneous
flow on a product space Ergodic Theory and Dynamical Systems, 27 (2007), 65–85.
4. Hausdorff dimension of the set of nonergodic directions, Annals of Mathematics, 158
(2003), 661–678.
SELECTED CONFERENCE TALKS
• Workshop on Lattice Algorithmics, CIRM, Marseille, France, 2010
• Dynamics and Geometry in Teichmuller space, CIRM, Marseille, France, 2009
• Conference on Dynamics in Teichmuller space, Roscoff Biological Center, France,
2008
• Workshop on Low Complexity Dynamics, Banff International Research Station, Canada,
2008
• Workshop on Shrinking Target Properties, Clay Mathematics Institute, Cambridge,
2008
• Workshop on Kleinian Groups and Teichmüller theory, Mathematical Sciences Research
Institute, Berkeley, 2007
• Hyperbolic Structures on 3-manifolds and the large scale geometry of Teichmüller
space, Warwick University, U.K., 2007.
• Dynamics of Lie Group Actions on Parameter Spaces Ben Gurion University, Israel,
2007.
• Global Dynamics Beyond Uniform Hyperbolicity, Northwestern University, 2006.
• Geometric Dynamics with Singularities, University of Exeter, UK, 2005.
• Dynamics in Teichmüller Space And Applications to Rational Billiards University of
Marseille II, France, 2003.
• International Congress of Mathematicians Beijing, PRC, 2002.
• EuroConference workshop on “Ergodic Theory, Riemannian Geometry and Number
Theory” Isaac Newton Institute for Mathematical Sciences, Cambridge, United
Kingdom, 2000.
RECENT SEMINAR/COLLOQUIUM TALKS
• North Carolina State University, Colloquium (January 2010)

• City College New York, Colloquium (March 2009)
• Ohio State University, Dynamics seminar (February 2009)
• University of Chicago, Geometry-Topology seminar (November 2008)
• University of Illinois at Chicago, Dynamics seminar (November 2008)
• Yale University, Dynamics seminar (November 2008)
• University of Southern California, Dynamics seminar (October 2008)
• University of Rennes, Ergodic theory seminar (June 2008)
• Northwestern University, Dynamics seminar (April 2008)
• Ben Gurion University of the Negev, Colloquium (April 2008)
• Princeton University, Ergodic Theory Seminar (Feb 2008)
• University of Illinois at Chicago, Dynamics Seminar (Dec 2007)
• University of Texas at Austin, Dynamics Seminar (Nov 2007)
• Pennsylvania State University, Dynamics Seminar (Nov 2007)
• University of Marseille at Luminy, Dynamics Seminar (July 2007)
• Institute of Mathematical Sciences (CUHK), Geometry Seminar (June 2007)
MISCELLANEOUS
• Co-organised a Special Session of the Americal Mathematical Society on Lie group
actions, Teichmuller flows and Number Theory, Spring 2009
• Academic Senate, member since Fall 2007
• Mathematical Sciences and Research Institute, Member, Fall 2007
• Organised graduate seminars at SFSU, Spring 2006 and 2007
• Co-organised a Special Session of the Americal Mathematical Society on Geometric
Dynamics and Ergodic Theory, Spring 2006
• Organised Mini-Conference at SFSU, Spring 2006
• Colloquium Director 2005-06
• Served as referee for Dynamical Systems, Geometriae Dedicata, Geometry and Topology,
Journal of Modern Dynamical Systems, Proceedings of the American Mathematical
Society.