Vol. 228, No. 1, 2006

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Quadratic forms over rational function fields in characteristic 2

Roberto Aravire and Bill Jacob

Vol. 228 (2006), No. 1, 19–51
Abstract

A basic result of Milnor and Scharlau determines the Witt ring of rational function fields Wk(x) whenever char k2. An analogous result is obtained here for the Witt group of quadratic forms Wq(x), where is a field of characteristic 2. This generalizes earlier work by the authors where was assumed to be perfect.

Keywords
Witt group, rational function fields, characteristic two
Mathematical Subject Classification 2000
Primary: 11E04
Milestones
Received: 25 February 2005
Revised: 15 September 2005
Accepted: 1 November 2005
Published: 1 November 2006
Authors
Roberto Aravire
Departamento de Ciencias Físicas y Matemáticas
Universidad Arturo Prat
Casilla 121
Iquique
Chile
Bill Jacob
Department of Mathematics
University of California Santa Barbara
Santa Barbara, CA 93106
United States