Configurations of - 2 Rational Curves on Sectional Surfaces of n-Folds.
Conics in characteristic 2
Conjecture de Franchetta forte.
Connectedness of intersections of special Schubert varieties.
Construction géométrique de la correspondance de McKay
Construction of space curves with good properties.
Continuous Étale Cohomology.
Contraction of excess fibres between the McKay correspondences in dimensions two and three
The quotient singularities of dimensions two and three obtained from polyhedral groups and the corresponding binary polyhedral groups admit natural resolutions of singularities as Hilbert schemes of regular orbits whose exceptional fibres over the origin reveal similar properties. We construct a morphism between these two resolutions, contracting exactly the excess part of the exceptional fibre. This construction is motivated by the study of some pencils of K3 surfaces appearing as minimal resolutions...
Contractions of Gorenstein polarized varieties with high nef value.
Contractions of smooth varieties. II. Computations and applications
Una contrazione su una varietà proiettiva liscia è data da una mappa propria, suriettiva e a fibre connesse in una varietà irriducibile normale . La contrazione si dice di Fano-Mori se inoltre è -ampio. Nel lavoro, naturale seguito e completamento delle ricerche introdotte in [A-W3], si studiano diversi aspetti delle contrazioni di Fano-Mori attraverso esempi (capitolo 1) e teoremi di struttura (capitoli 3 e 4). Si discutono anche alcune applicazioni allo studio di morfismi birazionali propri...
Contribution des droites d'une surface à ses multisécantes
Convex bodies associated to linear series
In his work on log-concavity of multiplicities, Okounkov showed in passing that one could associate a convex body to a linear series on a projective variety, and then use convex geometry to study such linear systems. Although Okounkov was essentially working in the classical setting of ample line bundles, it turns out that the construction goes through for an arbitrary big divisor. Moreover, this viewpoint renders transparent many basic facts about asymptotic invariants of linear series, and opens...
Correction to "Cartier-Dieudonné theory for Chow groups".
Correction to the gonality of smooth curves with plane models.
Corrections à l'article "Annulation du H1 et systèmes paracanoniques sur les surfaces".
Corrections to: “The algebraic topology of smooth algebraic varieties”
Correspondence homomorphisms for singular varieties
We study certain kinds of geometric correspondences between (possibly singular) algebraic varieties and we obtain comparison results regarding natural filtrations on the homology of varieties.
Correspondencias divisoriales entre esquemas relativos.
En este trabajo se estudian las correspondencias divisoriales entre dos esquemas relativos. Una correspondencia divisorial es una correspondencia algebraica entre los puntos de un esquema X y las clases de equivalencia lineal de divisores de otro esquema Y. Se consideran correspondencias triviales las que asignan a cada punto toda la variedad y las inversas de éstas. Por tanto las correspondencias divisoriales módulo las triviales son los divisores del producto módulo, módulo los divisores que provienen...
Courants positifs extrêmaux et conjecture de Hodge.
Courbe des trisecantes a une courbe lisse de P3 de degre d > 2g + 1.