@misc{13071,
  author = {Trygve Nilssen},
  title = {Weakly Positve Definite Matrices},
  abstract = {A weakly positive definite matrix is defined to be a matrix which can be written as a product of two positive definite matrices. This paper proves that a matrix is weakly positive definite if and only if the real eigenvalues are positive. The main components of the proof are Schur decomposition and mathematical induction.},
  year = {2005},
  number = {2005-07},
  publisher = {Simula Research Laboratory},
}