Charles Walter

# Charles Walter

Laboratoire J.-A. Dieudonné
Université de Nice - Sophia Antipolis
Parc Valrose
06108 Nice Cedex 02

email: walter@math.unice.fr

Office telephone: 04 92 07 60 21 -- Department fax: 04 93 51 79 74 -- Home telephone: 04 93 53 13 44

### Enseignement

L1 Informatique : Algèbre 1
M1 Maths Pures et Appliquées : Algèbre et Arithmétique

### The Algebra, Geometry, and Topology group at Nice

The group's home page is here . There are also the home pages of the department, of the laboratory, and of the university .
Published papers
1. Exterior algebra methods for the Minimal Resolution Conjecture (with David Eisenbud , Sorin Popescu , and Frank-Olaf Schreyer ), Duke Mathematical Journal 112 (2002), 379-395.
2. A Gersten-Witt Spectral Sequence for Regular Schemes (with Paul Balmer ), Ann. Scient. Éc. Norm. Sup. (4) 35 (2002), 127-152.
3. Lagrangian subbundles and codimension  3  subcanonical subschemes (with David Eisenbud and Sorin Popescu ), Duke Mathematical Journal 107 (2001), 427-467.
4. Enriques surfaces and other non-Pfaffian subcanonical subschemes of codimension  3  (with David Eisenbud and Sorin Popescu ), Communications in Algebra 28 (2000), 5629-5653.
5. Composante centrale du lieu de Brill-Noether dans  Hilbn P2,  Algebraic Geometry: Papers Presented for the Europroj Conferences in Catania and Barcelona, Marcel Dekker (1998) 341-349 (with M.-A. Coppo ).
6. On the Harder-Narasimhan Filtration for Coherent Sheaves on  P2 Algebraic Geometry: Papers Presented for the Europroj Conferences in Catania and Barcelona, Marcel Dekker (1998) 213-227.
7. Irreducibility of Moduli Spaces of Vector Bundles on Birationally Ruled Surfaces,  Algebraic Geometry: Papers Presented for the Europroj Conferences in Catania and Barcelona, Marcel Dekker (1998) 201-211.
8. Pfaffian Subschemes , J. Alg. Geometry 5 (1996), 671-704.
9. Curves in  P3  with the Expected Monad, J. Alg. Geometry 4 (1995), 301-320.
10. On Chow rings of fine moduli spaces of modules (with A. King), J. reine angew. Math. 461 (1995), 179-187.
11. Components of the stack of torsion-free sheaves of rank  2  on ruled surfaces, Math. Annalen 301 (1995), 699-715.
12. The minimal resolution of the homogeneous ideal of   general points of  P4,   Math. Z. 219 (1995), 231-234.
13. Hyperplane Sections of Arithmetically Cohen-Macaulay Curves, Proc. Amer. Math. Soc. 123 (1995), 2651-2656.
14. Hyperplane Sections of Curves of Small Genus, Comm. Algebra 22 (1994), 5167-5174.
15. Quelques strates de Brill-Noether du schÃ©ma de Hilbert de   P2  (with A. Hirschowitz and O. Rahavandrainy), C. R. Acad. Sci. Paris 319 (1994), 589-594.
16. Transversality Theorems in General Characteristic with Applications to Arithmetically Buchsbaum Schemes, Internat. J. Math. 5 (1994), 609-617.
17. Cohen-Macaulay Liaison, J. reine angew. Math. 444 (1993), 101-114.
18. Some Examples of Obstructed Curves in P 3, in "Complex Projective Geometry," LMS Lecture Notes Series 179 (1992), 324-340.
19. Curves on surfaces with a multiple line, J. reine angew. Math. 412 (1990), 48-62.

### Course notes, historical remarks, etc.

1. Variation of Quotients and Etale Slices in Geometric Invariant Theory , notes for a course for graduate students in algebra and geometry at Dyrkolbotn, Norway, on December 4-9, 1995.

Last updated: July 30, 2002.