triqs.gfs.backwd_compat.gf_imfreq.GfImFreq.from_L_G_R

GfImFreq.from_L_G_R(L, G, R)

Matrix transform of the target space of a matrix valued Green’s function.

Sets the current Green’s function \(g_{ab}\) to the matrix transform of \(G_{cd}\) using the left and right transform matrices \(L_{ac}\) and \(R_{db}\).

\[g_{ab} = \sum_{cd} L_{ac} G_{cd} R_{db}\]

Parameters:

L(a, c) ndarray

Left side transform matrix.

GGf matrix valued target_shape == (c, d)

Green’s function to transform.

R(d, b) ndarray

Right side transform matrix.

Notes

Only implemented for Green’s functions with a single mesh.