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Witt and cohomological
invariants of Witt classes
Nicolas Garrel |
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Vol. 5 (2020), No. 2, 213–248
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Abstract |
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We describe all Witt invariants and mod 2 cohomological invariants of the functor as combinations of fundamental invariants; this is related to the study of operations on mod 2 Milnor K-theory. We also study behaviour of these invariants with respect to products, restrictions, similitudes and ramification. |
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Keywords
cohomological invariants, Witt ring, fundamental ideal,
Pfister forms, Witt invariants
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Mathematical Subject Classification 2010
Primary: 11E81
Secondary: 12G05, 19D45
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Milestones
Received: 24 May 2018
Revised: 22 November 2019
Accepted: 18 December 2019
Published: 20 June 2020
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Authors |
| Nicolas Garrel | |
| Department of Mathematical and
Statistical Sciences University of Alberta Edmonton, AB Canada |
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