sentence1: the solid lines separate different homogeneous phases , the dashed lines indicate the limit of stability of the homogeneous phases with respect to smectic fluctuations , whereas the open circles represent the landau tetracritical points .
sentence2: the solid lines indicate phase boundaries as calculated by minimizing the onsager-zwanzig functional , the dashed line indicates the limit of stability of the nematic with respect to the smectic phase and the open circle the landau tetracritical point .