Level and Witt groups of real Enriques surfaces

R. Sujatha and J. van Hamel

Vol. 196 (2000), No. 1, 243–255

DOI: 10.2140/pjm.2000.196.243

Abstract

The Witt group of a real Enriques surface having real points is computed purely in terms of the topology of the real part. For a real Enriques surface without real points the level of the function field is shown to be 2, and the Witt group is computed in this case as well.

Milestones

Received: 7 December 1998

Revised: 9 August 1999

Published: 1 November 2000