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Authors
Affiliations
1 Equipe de Mathematiques, UMR 6623 du CNRS
Universite de Franche-Comte 16 Route de Gray
F-25030 Besancon Cedex, FR
2 University of Gent, Department of Pure Mathematics and Computer Algebra, Galglaan 2 B-9000 Gent, BE
Source
Journal of the Ramanujan Mathematical Society, Vol 13, No 2 (1998), Pagination: 85-110
Abstract
Let F be a non-formally real field. The u-invariant of F is by definition u(F) := sup{dimφ | φ an anisotropic quadratic form over K}.