Because of the attack on the computer network of the University of Duisburg-Essen, some content (in particular some image files) cannot be accessed because it is stored on central servers of the university.

The incidence divisor

The Hilbert-Chow morphism and the incidence divisor.  pdf  Submitted.  (Updated 29 Sept, 2010)

The Hilbert-Chow morphism and the incidence divisor: zero-cycles and divisors. pdf  To appear in Journal of Pure and Applied Algebra.

The incidence divisor of cycles in projective space. pdf  To appear in Communications in Algebra.


Seminormal schemes

A characterization of seminormal schemes.  pdf  Journal of Algebra, Vol. 323, Issue 5,  1 March 2010, Pages 1494-1502.    Corrigendum.  pdf  Journal of Algebra, Volume 323, Issue 11, 1 June 2010, Pages 3155-3156.