Left: distance modulus based on the Pantheon SnIa set, rescaled by the best-fit ΛCDM model (Ω_m, 0 = 0.297 ± 0.018). The dashed line at zero corresponds to ΛCDM, the red line is the GA fit, and the shaded region corresponds to the 1σ GA errors. Right: duality relation η(z) for the GA reconstruction of d_A(z) from the BAO data and the luminosity distance d_L(z) based on the Pantheon SnIa set. The dashed line at unity is ΛCDM, the red line is the GA fit, and the shaded region is the 1σ GA errors.