lu_factorΒΆ
LU Factorisation wrapper of:
\[LU = (\sigma \mathbf{I} - \mathbf{A})\]
In the case of A
being a sparse matrix, the sparse methods in scipy are employed
- param sigma
Expansion frequency
- type sigma
float
- param A
Dynamics matrix
- type A
csc_matrix or np.ndarray
- returns
tuple (dense) or SuperLU (sparse) objects containing the LU factorisation
- rtype
tuple or SuperLU