distance.angular        compute the angular diameter distance [Mpc/h]
distance.comoving       compute the comoving distance (line-of-sight)
                        [Mpc/h]
distance.luminosity     Compute the luminosity distance [Mpc/h]
distance.transverse     compute the comoving distance (transverse)
                        [Mpc/h]
eZ                      compute E(z) of given cosmology
eZ2                     compute E^2(z) of given cosmology
parameter.DH            Hubble Distance D_H = c/H_0 [Mpc/h]
parameter.constant      Physical constants in SI units, source: [PDG]
parameter.fidcosmo      Fiducial cosmology parameter list
parameter.unit          useful conversion of astrophysical units
rhoc                    calculate the critical density at redshift z
valid.cosmo             validate the cosmologial parameters are enough
