Math needs to be this way for precision. There are dozens of "conversions of signal into frequencies" besides Fourier transform: Z-transform, Laplace tansform,

Math needs to be this way for precision. There are dozens of "conversions of signal into frequencies" besides Fourier transform: Z-transform, Laplace tansform, Wigner transform and so on. Normal language deals with few concepts, math deals with thousands. Soviet countries wanted to isolate their peoples from western ideas. If you start teaching about Fourier transform in schools, students are going to ask who that Fourier is.