2 papers
math.RA2022
Degree relative invariant for unitary involutions
Demba Barry, Alexandre Masquelein, Anne Quéguiner-Mathieu
Using the Rost invariant for non split simply connected groups, we define a relative degree cohomological invariant for pairs of orthogonal or unitary involutions having isomor…
math.RA2009
Quadratic forms of dimension 8 with trivial discrimiand and Clifford algebra of index 4
Alexandre Masquelein, Anne Quéguiner-Mathieu, Jean-Pierre Tignol
Izhboldin and Karpenko proved in 2000 that any quadratic form of dimension 8 with trivial discriminant and Clifford algebra of index 4 is isometric to the transfer, with respect to…