Method

NumCosmoHICosmoQSplineq_transition

Declaration [src]

gdouble
nc_hicosmo_qspline_q_transition (
  NcHICosmoQSpline* qspline
)

Description [src]

Gets the deceleration-acceleration transition redshift, i.e. the smallest $z \in [0, z_f]$ where the reconstructed $q(z)$ crosses zero. Returns NaN when $q(z)$ has no sign change over the reconstruction range.

Return value

Type: gdouble

The transition redshift $z_t$ such that $q(z_t) = 0$, or NaN.