Pakachat Rakpakawong. 2006. Positive definite of symmetric matrix by leading backward principal minors. Field of Study Mathematics, Naresuan University;
Pakachat Rakpakawong. (2006) Positive definite of symmetric matrix by leading backward principal minors . Naresuan University/Phitsanulok.
Pakachat Rakpakawong. Positive definite of symmetric matrix by leading backward principal minors. . Phitsanulok:Naresuan University, 2006.
Pakachat Rakpakawong. (2006) Positive definite of symmetric matrix by leading backward principal minors . Naresuan University/Phitsanulok.