TY - JOUR AU - Karim Johannes Becher AU - Detlev W. Hoffmann TI - Isotropy of quadratic spaces in finite and infinite dimension JO - Documenta mathematica PY - 2007 SP - 473 EP - 504 VL - 12 UR - http://geodesic.mathdoc.fr/articles/10.4171/dm/231/ DO - 10.4171/dm/231 ID - 10_4171_dm_231 ER -