TY - JOUR AU - Au-Yeung, Yik-Hoi AU - Yuen, Tai-Kwok TI - A characterization of the definiteness of a Hermitian matrix JO - Glasgow mathematical journal PY - 1974 SP - 1 EP - 4 VL - 15 IS - 1 UR - http://geodesic.mathdoc.fr/articles/10.1017/S0017089500002019/ DO - 10.1017/S0017089500002019 ID - 10_1017_S0017089500002019 ER -