Hyperbolic symmetries, inflaton–phantom cosmology, and inflationR. Cartas-Fuentevilla, A. Escalante-Hernandez, A. Herrera-Aguilar and R. Gonzalez-CuagliaEur. Phys. J. Plus, 135 6 (2020) 529DOI: https://doi.org/10.1140/epjp/s13360-020-00513-6