I am going to set up my Bachelors project in analysis of non-linear wave phenomena, and I am planning to study plots and graphs of nonlinear spectra.
In this context, I am quite familiar with the Fourier transform, however, does anyone here know of other methods too, such as Lebesgue integral, or other methods that can be used on analytic nonlinear functions of these spectra so to find common pattern among them, and also quantify their magnitudes and norms?
Thanks