M.Tezuka and N.Yagita: Note on the cohomological invariant of Pfister forms

tez@sci.u-ryukyu.ac.jp, yagita@mx.ibaraki.ac.jp

Submission: 2010, Apr 22

The cohomological invariant ring of the n-Pfister forms is isomorphic to the invariant ring in that of an elementary abelian 2-group of rank n under a GL(n,Z/2)-action.

2000 Mathematics Subject Classification: Primary 11E72, Secondary 12G05

Keywords and Phrases: Pfister forms, cohomological invariant, Dickson invariant

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