Variation between the lepton pressure computed using the D-EoS with that computed by the T-EoS. The EoSs are evaluated for a pure ¹⁶O composition, $\overline{A}=16$ and $\overline{Z}=8$. We also highlight four different regions separated by the red lines. Zone &#Xtextcircled;1 corresponds to the region where the total pressure is dominated by radiation pressure. In zone &#Xtextcircled;2 perfect gas pressure is dominant. Zone &#Xtextcircled;3 is dominated by non-relativistic degenerate electron pressure. Zone &#Xtextcircled;4 marks the limit where the electrons become relativistic. The region where $\mathrm{\Gamma }={\frac{\partial lnP}{\partial ln\rho }|}_{\mathrm{ad}}<4/3$ is black-hashed. Finally the orange dashed line corresponds to the relation $T=2.27\times {10}^5{\rho }^{1/3}{\overline{Z}}^2/{\overline{A}}^{1/3}$, below which Γ_C ≤ 1 (Eq. (5)) and Coulomb corrections to the EoS are important.