3 papers
math.AG2005
Families of space curves with large cohomology
Nadia Chiarli, Silvio Greco, Uwe Nagel
We investigate space curves with large cohomology. To this end we introduce curves of subextremal type. This class includes all subextremal curves. Based on geometric and numerical…
math.AG2004
Halphen conditions and postulation of nodes
L. Chiantini, N. Chiarli, S. Greco
We give sharp lower bounds for the postulation of the nodes of a general plane projection of a smooth connected curve C in P^r and we study the relationships with the geometry of t…
math.AG2003
Normal form for space curves in a double plane
Nadia Chiarli, Silvio Greco, Uwe Nagel]
This note is an attempt to relate explicitly the geometric and algebraic properties of a space curve that is contained in some double plane. We show in particular that the minimal…