gftool.matrix.UDecomposition.from_gf¶
-
classmethod
UDecomposition.
from_gf
(gf) → gftool.matrix.Decomposition¶ Decompose the inverse Green’s function matrix.
The similarity transformation:
\[G^{-1} = P g P^{-1}, \quad g = diag(λ_l)\]- Parameters
- gf(…, N, N) complex np.ndarray
matrix to be decomposed
- Returns
- Decomposition