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math.AG2001
Nondegenerate multidimensional matrices and instanton bundles
Laura Costa, Giorgio Ottaviani
In this note we prove that the moduli space of rank symplectic instanton bundles on ${\PP^{2n+1}}$, defined from the well known monad condition, is affine. This result was not…
math.AG2001
Group action on instanton bundles over $\PP^3$
Laura Costa, Giorgio Ottaviani
Denote by MI(k) the moduli space of k-instanton bundles E of rank 2 on $\PP^3=\PP(V)$ and by the scheme of k-jumping lines. We prove that is not stable for…
math.AG1998
Vector bundles on Fano 3-folds without intermediate cohomology
Enrique Arrondo, Laura Costa
We study the vector bundles without intermediate cohomology on Fano threefolds of index two, degree d=3,4,5 and Betti number one. We obtain a complete characterization in the case…