$L
$L : array
Decomposition storage.
Cholesky decomposition class.
For a symmetric, positive definite matrix A, the Cholesky decomposition is an lower triangular matrix L so that A = L*L'.
If the matrix is not symmetric or positive definite, the constructor returns a partial decomposition and sets an internal flag that may be queried by the isSPD() method.
$L : array
Decomposition storage.
$m : int
Matrix row and column dimension.
$isspd : bool
Symmetric positive definite flag.