gftool.basis.pole.PoleFct

class gftool.basis.pole.PoleFct(poles: ndarray, residues: ndarray)

Function given by finite number of simple poles and residues.

Parameters:

poles, residues(…, N) complex np.ndarray

Poles and residues of the function.

__init__(*args, **kwargs)

Methods

__init__(*args, **kwargs)
count(value, /)	Return number of occurrences of value.
eval_z(z)	Evaluate the function at z.
from_moments(moments[, width])	Generate instance matching high-frequency moments.
from_z(z, gf_z, n_pole[, moments, width, weight])	Generate instance fitting gf_z.
index(value[, start, stop])	Return first index of value.
moments(order)	Calculate high-frequency moments of order.

Attributes

poles	Poles of the function.
residues	Residues corresponding to the poles.