### Titre: Equations D3 and the Iskovskih classification

#### V. Golyshev (Moscou)

Résumé:
The principal conjecture of mirror symmetry predicts
that certain differential equations built from Gromov-Witten
invariants will turn out to be geometric, i.e. of Picard-Fuchs type.
Thus, a classification problem in algebraic geometry
can be translated into a mirror-dual classification problem
in DE's. As an illustration, we shall approach a problem that
we believe to be mirror dual to the problem of classifying
Fano threefolds with one-dimensional Picard lattice
(solved first by Iskovskih).