Graphics of elementwise functions

**Figure 2:** Elementwise functions
$\includegraphics[angle=-90,width=0.45\textwidth]{efunc_0.ps}$ $\includegraphics[angle=-90,width=0.45\textwidth]{efunc_1.ps}$ $\includegraphics[angle=-90,width=0.45\textwidth]{efunc_2.ps}$ $\includegraphics[angle=-90,width=0.45\textwidth]{efunc_3.ps}$ $\includegraphics[angle=-90,width=0.45\textwidth]{efunc_4.ps}$ $\includegraphics[angle=-90,width=0.45\textwidth]{efunc_4.ps}$