4 papers
A new proof of the Artin-Springer theorem in Schur index 2
Anne Quéguiner-Mathieu, Jean-Pierre Tignol
We provide a new proof of the analogue of the Artin-Springer theorem for groups of type that can be represented by similitudes over an algebra of Schur index : an a…
Triality over fields with
Fatma Kader Bingöl, Anne Quéguiner-Mathieu
We characterize isotropic trialitarian triples in terms of the Schur indices of the underlying algebras over a base field of arbitrary characteristic satisfying . We…
A-upper motives of reductive groups
Charles De Clercq, Nikita Karpenko, Anne Quéguiner-Mathieu
Given a prime number , we perform the study of Chow motives and motivic decompositions, with coefficients in , of projective homogeneous varieties for $p…
Witt groups of Severi-Brauer varieties and of function fields of conics
Anne Quéguiner-Mathieu, Anne Quéguiner-Mathieu, Jean-Pierre Tignol
The Witt group of skew hermitian forms over a division algebra with symplectic involution is shown to be canonically isomorphic to the Witt group of symmetric bilinear forms ov…