ifferent choices of the center of the band, then we look at these all together.

We will work with a particular type of wavelet that is *strictly* one-sided, that is, having no energy at negative frequencies.

Such a wavelet is said to be *analytic*.  It is built up entirely from contributions due to positively-rotating Fourier components.

To isolate the negatively-rotating variability we use the complex conjugate of the analytic wavelet.  This filter has no support at positive frequencies as is said to be