4 papers · 1 filter
À propos des variétés de Poncelet
Jean Vallès
We recall the definition of Poncelet varieties that generalize the celebrated Poncelet curves introduced by Darboux. We show that any quadric and any smooth cubic in the projective…
Fibrés de Schwarzenberger et fibrés logarithmiques généralisés
Jean Vallès
We propose a generalization of logarithmic and Schwarzenberger bundles over $¶^n=¶^n(\C)$ when the rank is greater than . The first ones are associated to finite sets of points…
Fibrés vectoriels de rang deux sur provenant d'un revêtement double
Jean Vallès
Since Schwarzenberger and his celebrated paper called "Vector bundles on the projective plane" we know that any rank two vector bundle on is a direct image of a line bundle o…
Fibrés logarithmiques sur le plan projectif
Jean Vallès
We describe the scheme of jumping lines of logarithmic vector bundles on the projective plane. This result is already proved by Dolgachev and Kapranov when the first Chern class is…