Deformations of maximal Cohen-Macaulay modules.
Deformations of multiple fibres.
Deformations of Normal Surface Singularities with C* Action.
Deformations of Principal Bundles on the Projective Line.
Deformations of ruled mainfolds.
Deformations of ruled surfaces.
Deformations of Weierstraß Elliptic Surfaces.
Deforming Vector Bundles on the Projective Plane.
Delta-composantes des espaces de modules de revêtements
Nous nous intéressons aux composantes irréductibles des espaces de modules de G-revêtements et à leurs corps de définition. Nos résultats permettent de construire, quel que soit le groupe fini, de telles composantes définies sur . Notre méthode laisse de plus une grande latitude quant au type de ramification des revêtements. Ces composantes sont obtenues par déformation de certains revêtements du bord des espaces de modules. Enfin, ces composantes sont aussi compatibles dans une tour d’espaces...
Determining obstructions for space curves, with applications to non-reduced components of the Hilbert scheme.
Differential graded Lie algebras controlling infinitesimal deformations of coherent sheaves
Double point resolutions of deformations of rational singularities
Effective Nullstellensatz for arbitrary ideals
Let be polynomials in variables without a common zero. Hilbert’s Nullstellensatz says that there are polynomials such that . The effective versions of this result bound the degrees of the in terms of the degrees of the . The aim of this paper is to generalize this to the case when the are replaced by arbitrary ideals. Applications to the Bézout theorem, to Łojasiewicz–type inequalities and to deformation theory are also discussed.
Ein Kriterium für die Offenheit der Versalität.
Extremal rays on smooth threefolds
Families of Curves on Surfaces.
Families of Curves with Nodes on K-3 Surfaces.
Families of varieties with prescribed singularities
Flache T1-Stabilität in der Stratifizierung Verseller Entfaltungen.
Generic finite schemes and Hochschild cocycles.