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…