Method

NumCosmoHICosmoq

Declaration [src] 

gdouble
nc_hicosmo_q (
  NcHICosmo* cosmo,
  const gdouble z
)

Description [src]

Computes the deceleration parameter $q(z) = -\frac{\ddot{a}a}{\dot{a}^2}$.

Parameters

z

Type: const gdouble

Redshift $z$.

Return value

Type: gdouble

The deceleration parameter $q(z)$.