TY - JOUR AU - M. A. Novikov TI - Signdefiniteness and reduction to full squares for the bundle of tree quadratic forms JO - The Bulletin of Irkutsk State University. Series Mathematics PY - 2016 SP - 74 EP - 92 VL - 18 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/IIGUM_2016_18_a5/ LA - ru ID - IIGUM_2016_18_a5 ER -