2 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 over a field with a subfield such that is a quadratic separable extension and $\operatorname{cha…
math.AC2016
Isotropy of 5-dimensional quadratic forms over the function field of a quadric in characteristic 2
Andrew Dolphin, Ahmed Laghribi
We complete a classification of quadratic forms over a field of characteristic 2 of type (1,3) that become isotropic over the function field of a quadric.