TY  - JOUR
AU  - Brand, Daniel
TI  - When is a Matrix Positive
JO  - Canadian mathematical bulletin
PY  - 1974
SP  - 409
EP  - 410
VL  - 17
IS  - 3
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CMB-1974-076-1/
DO  - 10.4153/CMB-1974-076-1
ID  - 10_4153_CMB_1974_076_1
ER  -