Next: Analysis of a Up: No Title Previous: One example . We will start with a simple wavelet: the `Mexican hat', shown on Fig. ... Figure 2: The Mexican hat wavelet . It is important to note that, for this to be a wavelet, the positive and negative areas `under' the curve must cancel out. This is known as the admissibility condition. Analytically, the Mexican hat wavelet is represented by . ... Selection of the wavelet shape is one of the important decisions on the user's part. ...