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math.AG2019
On the splitting principle for cohomological invariants of reflection groups
Stefan Gille, Christian Hirsch
Let be a field and a finite orthogonal reflection group over . We prove Serre's splitting principle for cohomological invariants of with va…
math.AG2018
On the decomposability of mod 2 cohomological invariants of Weyl groups
Christian Hirsch
We compute the invariants so of Weyl groups in mod 2 Milnor K-theory and more general cycle modules, which are annihilated by 2. Over a base field of characteristic coprime to the…