Pencils of minimal degree on curves on a K3 surface.
Period relations and the Tate conjecture for Hubert modular surfaces.
Periodic automorphisms of surfaces: Invariant circles and maximal orders.
Periodic integrals and tautological systems
We study period integrals of CY hypersurfaces in a partial flag variety. We construct a regular holonomic system of differential equations which govern the period integrals. By means of representation theory, a set of generators of the system can be described explicitly. The results are also generalized to CY complete intersections. The construction of these new systems of differential equations has lead us to the notion of a tautological system.
Periods of Enriques Surfaces.
Periods of Mixed Cusp Forms.
Persson's list of singular fibers for a rational elliptic surface.
Perturbations of the metric in Seiberg-Witten equations
Let a compact connected oriented 4-manifold. We study the space of -structures of fixed fundamental class, as an infinite dimensional principal bundle on the manifold of riemannian metrics on . In order to study perturbations of the metric in Seiberg-Witten equations, we study the transversality of universal equations, parametrized with all -structures . We prove that, on a complex Kähler surface, for an hermitian metric sufficiently close to the original Kähler metric, the moduli space...
Perverse sheaves and the cohomology of Hilbert schemes of smooth algebraic surface.
Picard groups of Zariski surfaces
Picard-Zahlen komplexer Tori.
Pinceaux de droites et automorphismes des surfaces affines.
Plane curve singularities and carousels
In this paper we give a direct and explicit description of the local topological embedding of a plane curve singularity using the Puiseux expansions of its branches in a given set of coordinates.
Plane curves whose singular points are cusps and triple coverings of p2.
Pluricanonical maps for threefolds of general type
In this paper we will prove that for a threefold of general type and large volume the second plurigenera is positive and the fifth canonical map is birational.
Plurigenera of regular threefolds.
Poincaré automorphisms for nondegenerate CR quadrics.
Points at rational distance from the corners of a unit square
Points at rational distance from the vertices of a triangle
Points non factoriels des variétés de modules de faisceaux semi-stables sur une surface rationnelle.