The 2005 AMS Summer Research Institute on Algebraic Geometry was held at
the University of Washington, Seattle, from July 25 through August 12, 2005. The
advisory committee consisted of the ﬁve of us together with V. Alexeev, J. de Jong,
J. Li, and K. Smith. The articles in the present volumes represent the plenary
lectures, the Clay lectures, and several surveys related to seminar talks.
The ﬁrst week of the Institute was centered on moduli problems and the inter-
actions between algebraic geometry, symplectic geometry and string theory. The
topic of the second week was classical algebraic geometry with a focus on bira-
tional geometry. Arithmetic geometry and characteristic p methods were taken up
in the third week. The seminar organizers, V. Alexeev, D. Auroux, D. Ben-Zvi,
F. Bogomolov, J. Bryan, H. Esnault, W. Fulton, N. Katz, S. Katz, K. Kedlaya,
J. Koll´ ar, R. Lazarsfeld, M. Levine, J. Li, E. Miller, Y. Ruan, K. Smith, B. Siebert,
Y. Tschinkel, G. Tian, B. To¨ en, and E. Viehweg, played an important role in struc-
turing the scientiﬁc program.
A large fraction of the participants stayed for the entire period. With a total of
513 mathematicians in attendance, Seattle 2005 was perhaps the largest algebraic
geometry conference in history.
We would like to thank J. Maxwell, R. Aguiar, and L. Melucci of the AMS
for their work in the planning and the day-to-day organization of the Institute.
The principal funding for the program came from the NSF. D. Ellwood and the
Clay Institute provided crucial additional support as did DARPA and the NSA.
S. Kov´ acs, T. Pantev, and R. Vakil put together an outstanding graduate student
program that started before and extended for the duration of the Institute.
Finally, we would particularly like to thank all the speakers and participants
for their contributions to Seattle 2005. The success of the Institute was due to
D. Abramovich, A. Bertram, L. Katzarkov
R. Pandharipande, M. Thaddeus