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math.KT2023
Even Stiefel-Whitney invariants for anti-hermitian quaternionic forms
Nicolas Garrel
We extend all cohomological invariants of similarity classes of quadratic forms to anti-hermitian forms over a quaternion algebra. This uses the fact that such invariants can be li…
math.KT2017★ 2 cited
Witt and Cohomological Invariants of Witt Classes
Nicolas Garrel
We classify all invariants of the functor (powers of the fundamental ideal of the Witt ring) with values in , that it to say functions compatible…