# get_Cw_cpx¶

Produces a sparse matrix

$\bar{\mathbf{C}}(z)$

where

$z = e^{k \Delta t}$

such that the wake circulation frequency response at $$z$$ is

$\bar{\boldsymbol{\Gamma}}_w = \bar{\mathbf{C}}(z) \bar{\mathbf{\Gamma}}$