One-motives and a conjecture of Deligne

One-parameter families containing three-dimensional toric Gorenstein singularities

One-Parameter Toric Deformations of Cyclic Quotient Singularities

Oort groups and lifting problems

Oort's conjecture for A_g

Open Gromov-Witten invariants and superpotentials for semi-Fano toric surfaces

Open Gromov-Witten Theory and the Crepant Resolution Conjecture

Open orbifold Gromov-Witten invariants of [C^3/Z_n]: localization and mirror symmetry

Open problems (for AGNES)

Open Problems in the Theory of Ample Fields

Open problems of the conference Automorphisms of Affine Spaces

Open problems on open algebraic varieties

Open String Invariants and Mirror Curve of the Resolved Conifold

Open Virtual Structure Constants and Mirror Computation of Open Gromov-Witten Invariants of Projective Hypersurfaces

Operads, deformation theory and F-manifolds

Operads, Grothendieck topologies and Deformation theory

Operateurs differentiels globaux sur les courbes elliptiques

Opers

Opers and Theta Functions

Opposite filtrations, variations of Hodge structure, and Frobenius modules