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math.AG2000
A focus on focal surfaces
E. Arrondo, M. Bertolini, C. Turrini
We make a systematic study of the focal surface of a congruence of lines in the projective space. Using differential techniques together with techniques from intersection theory, w…
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…
math.AG1998
Vector bundles on G(1,4) without intermediate cohomology
Enrique Arrondo, Beatriz Grana
We characterize the vector bundles on G(1,4) that have no intermediate cohomology. We obtain them from extensions of the universal bundles and others related with them. In particul…