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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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