Demba Barry

collaborators

3 papers

math.AC2018

The descent of biquaternion algebras in characteristic two

Demba Barry, Adam Chapman, Ahmed Laghribi

In this paper we associate an invariant to a biquaternion algebra $B$ over a field $K$ with a subfield $F$ such that $K / F$ is a quadratic separable extension and $\operatorname{cha…

math.GR2018

Outer automorphisms of adjoint groups of type D and non-rational adjoint groups of outer type A

Demba Barry, Jean-Pierre Tignol

For a classical group $G$ of type $D_{n}$ over a field $k$ of characteristic different from $2$ , we show the existence of a finitely generated regular extension $R$ of $k$ su…

math.RA2013

Decomposable and Indecomposable Algebras of Degree 8 and Exponent 2

Demba Barry

We study the decomposition of central simple algebras of exponent 2 into tensor products of quaternion algebras. We consider in particular decompositions in which one of the quater…