# triqs.gf.descriptors.Flat¶

class triqs.gf.descriptors.Flat(half_bandwidth)[source]

The Hilbert transform of a flat density of states, with cut-off

$g(z) = \int \frac{A(\omega)}{z-\omega} d\omega$

where $$A(\omega) = \theta( D^2 - \omega^2)/(2D)$$.

(Only works in combination with frequency Green’s functions.)

Methods

__init__(half_bandwidth)
param half_bandwidth:
$$D$$, the half bandwidth