Fig. 4. The temperature dependence of $R_{xx}$ and $\cot\Theta_{H}$ in the Born-Infeld case with $a>0$. Density plots of ${\rm d}\log_{10}({\rm d}R_{xx}/{\rm d}T)/{\rm d}\log_{10}T$ and ${\rm d}\log_{10}({\rm d}\cot\Theta_{H}/{\rm d}T)/{\rm d}\log_{10}T$ for various fixed values of $a$, $\rho /\alpha^{2}$ and $h/\alpha^{2}$.
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