%0 Journal Article %A Becher, Karim Johannes %A Hoffmann, Detlev W. %T Isotropy of quadratic spaces in finite and infinite dimension %J Documenta mathematica %D 2007 %P 473-504 %V 12 %I mathdoc %U http://geodesic.mathdoc.fr/item/DOCMA_2007__12__a7/ %G en %F DOCMA_2007__12__a7