4 papers
On Wahl's proof of
Roberto Pignatelli, Fabio Tonoli
D. Jaffe and D. Ruberman proved in 1997 that a sextic hypersurface in has at most 65 nodes (the bound is sharp by Barth's construction). Almost at the same time, J.…
A remarkable moduli space of rank 6 vector bundles related to cubic surfaces
Fabrizio Catanese, Fabio Tonoli
We study the moduli space $\fM^s(6;3,6,4)$ of simple rank 6 vector bundles $\E$ on $\PP^3$ with Chern polynomial and properties of these bundles, especially we pro…
An explicit construction of ruled surfaces
Alberto Alzati, Fabio Tonoli
The main goal of this paper is to give a general method to compute (via computer algebra systems) an explicit set of generators of the ideals of the projective embeddings of some r…
Even sets of nodes on sextic surfaces
Fabrizio Catanese, Fabio Tonoli
We determine the possible even sets of nodes on sextic surfaces in $\Pn 3$, showing in particular that their cardinalities are exactly the numbers in the set .…