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Mexican Hat

The Mexican hat defined by Murenzi [30] is:
$\displaystyle g(x) = (1 - x^2) e^{-\frac{1}{2}x^2}$     (14.8)

it is the second derivative of a Gaussian (see figure 14.2).
  
Figure 14.2: Mexican Hat
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}}
\end{figure}



Petra Nass
1999-06-15