Gravitational mass-central baryon density M − n_b relations for selected spin frequencies f, for stars composed of the BSK20 EOS (dashed red lines) and four hyperonic EOSs: DS08 (solid green), BM165 (dash-dotted black), GM1Z0 EOS (dashed blue) and TM1C (solid red lines). High- and low-density ends correspond to the axisymmetric instability and the mass-shedding limits, respectively. From bottom to top for each EOS, f equals 0, 900, 1000, 1100 and 1200 Hz. (Color online.)