**Plenarias:**

**David Eisenbud** *(M. S. R. I. Berkeley, U.S.A.)*

"The smallest algebraic sets in projective
space"

**Etienne Ghys** *(E. N. S. de Lyon, Francia)*

"Braids and signatures"

**Nigel Hitchin** *(U. de Oxford, U.K.)*

"Geometry with B-fields"

**Jacob Palis** *(IMPA, Rio de Janeiro, Brasil)*

"A global scenario for non-conservative
dynamics"

**S.R.S. Varadhan** *(C.I.M.S., Universidad de Nueva
York, U.S.A.)*

"Random walks and diffusions in
a random enviroment"

**Conferencias Invitadas Especiales:**

**A. Adem ***(Madison, Wisconsin, U.S.A)*

"Periodic complexes
and group actions"

R. Benguria *(Universidad Católica, Chile)*

"Connection between the Lieb-Thirring
conjecture for Schrödinger operators and an
isoperimetric problem for ovals on the plane"

**C. Bonatti** *(Dijón, Francia)*

"The global dynamics of C1-generic diffeomorphisms
or flows"

**X. Gómez-Mont** *(CIMAT, México)*

"Computing topological numbers with homological
algebra"

**A. Lins Neto** *(IMPA, Brasil)*

"Irreducible components of the space of codimension
one foliations: a conjecture and its solution in some
particular cases"

**D. Marchesin** *(IMPA, Brasil)*

"Asymptotic Dynamics for Non-linear Viscous Conservation
Laws"

**G. Paternain** *(Montevideo, Uruguay y Cambridge,
U.K.)*

"Zero entropy and bounded topology"

**R. Schoen*** (U. Stanford, USA)*

"On the mathematical work of José Escobar"

**J. Tirao ***(Córdoba, Argentina)*

"Matrix valued spherical functions and the hypergeometric
equation"

**Le Dung Trang** *(Trieste, Italia)*

"The Topology of plane curve singularities"

**M. Todd*** (Cornell, U.S.A.)*

"Conic linear optimization"

**A. Verjovsky** *(Cuernavaca, México)*

"Geometric Galois Theory : the
surface principle"