%0 Journal Article
%T Pfister's Theorem for orthogonal involutions of degree 12
%A Skip Garibaldi
%A Anne Qu¨¦guiner-Mathieu
%J Mathematics
%D 2008
%I arXiv
%R 10.1090/S0002-9939-08-09674-3
%X We use the fact that a projective half-spin representation of $Spin_{12}$ has an open orbit to generalize Pfister's result on quadratic forms of dimension 12 in $I^3$ to orthogonal involutions.
%U http://arxiv.org/abs/0802.1172v1