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During the academic year 2004-05, a year-long program of activity will
take place at the

. The plan is
for a systematic, focused activity with the dual aim of discussing new
results and putting new insights gained from physics into the general
mathematical framework.

The first half-year of the program will have a mathematical focus
and the second half-year a physical one. Each half-year will involve
specialized workshops (see below) and mini-courses.
We are also preparing to hold the *Strings 2005* Conference to wrap up this year-long
program.

The program will be devoted to mathematical subjects motivated by
string theory, and to recent developments in string theory and related
physical fields which are of strong mathematical interest. On the mathematical
side, the aim is to foster interaction between such areas of mathematics
as derived categories, elliptic cohomology, geometric Langlands correspondence,
quantum cohomology, differential geometry varieties with special holonomy
and of special Lagrangian varieties. On the more physical side, the
aim is to foster new progress in the continuing drive towards understanding
the foundations of string/M-theory, and in the wealth of new ideas involving
D-branes, BPS states and various dualities which are of great importance
to mathematical subjects such as algebraic geometry.

held Tuesdays at the Perimeter Institute, held Thursdays at the Fields
Institutue

**January 10-14, 2005**

Workshop
on Topological Strings

*Organizing Cttee: *E. Getzler, K. Hori, S. Katz

held at the Fields Institute

**January 17-20, 2005**

**Coxeter Lecture Series**

*Speaker:* **Robbert Dijkgraaf****
**(Institute for Theoretical Physics, Amsterdam)

**March 21-25, 2005**

Workshop on N=1 Compactifications

*Organizers:* M. Douglas, K. Hori, S. Sethi

held at the Fields Institute

**March 28-April 1, 2005**

Workshop on String Phenomenology

*Organizers:* J. Louis, R. Myers, G. Shiu

held at the Perimeter Institute

**April 4-5,7, 2005**

**Distinguished Lecture Series **

*Speaker: ***Edward
Witten** (IAS, Princeton)

**May 2-6, 2005**

Workshop on Gravitational Aspects of String
Theory

*Organizers: * P. Kraus, D. Marolf, A. Peet

held at the Fields Institute

**May 9-11, 2005**

**Coxeter Lecture Series**

Speaker: **Renata
Kallosh** (Physics, Stanford)

**June 2, 2005 -- 4:00 p.m.**

Clay Math Institute Public Lecture

Speaker:** Eric Zaslow**, Northwestern University

*Physmatics *

**June 8-12, 2005**

**Workshop on Schubert Varieties**

*Organizers: *Lisa Jeffrey, Megumi Harada, Alistair Savage, Alexander
Yong

**June 20-July 8, 2005**

Summer
School Program

Strings, Gravity and Cosmology

*Organizers: *A. Buchel, T. Lee, R. Myers, M. Rozali, G. Semenoff

held at the Perimeter Institute

As a conclusion to the 2004-05 String Theory Thematic Program activities
at the Fields and Perimeter Institutes, Strings 2005 will be held
at the University of Toronto. The Strings Conference is held annually,
where physicists get together from all over the world to present and
discuss new developments of string theory. It consists of invited
talks by leading physicists of this field.

Conferences are held in a different location each year; past venues
included USC (1995), ITP
Santa Barbara(1996), Amsterdam (1997), ITP
Santa Barbara (1998), Potsdam (1999), Ann Arbor (2000),
Mumbai (2001), Cambridge
(2002), Kyoto (2003) and
Paris (2004) . Strings
2005 in Toronto will be the inaugural Strings Conference in Canada.

### Program Activities 2004

FALL - Course on String Theory*, Instructor:* A. Peet

FALL - Course on Mirror Symmetry*, Instructor:* K. Hori

November 8-12, 2004 -- Mini-Course on Frobenius Manifolds and Integrable
Hierarchies,* *

Instructor : Boris Dubrovin (SISSA, Trieste)

### Past Program Activities 2004

**String Theory Seminar** (held
bi-weekly on Mondays & Wednesdays)

held at the Fields Institute

**September 27-October 2, 2004**

**Workshop on Forms of Homotopy Theory:
Elliptic Cohomology and Loop Spaces **

*Organizing Cttee: *M. Ando (UIUC), M. Hopkins (MIT), H. Miller
(MIT), J. Morava (Johns Hopkins)

held at the Fields Institute

**November 15-17, 2004**

Coxeter Lecture Series

*Speaker: ***Nigel Hitchin**
(Mathematical Institute, Oxford)

November 15, 16 at 3:30 p.m. talks held at the Fields Institute

November 17 at 2:00 p.m. talk held at the Perimeter Institute

**November 19-23, 2004**

Workshop on Mirror Symmetry

*Organizing Cttee:* D. Auroux, M. Gross, K. Hori, N. Yui

held at the Perimeter Institute