Re:Demystifying Fourier Analysis
by euroderf on Thursday November 17, 2022 @10:53AM
(#33640682)
It's not for nothing that at college, the course in Fourier Series & Boundary Value Problems was better known as Mystery Math. There was a single key insight that made the entire course suddenly clear as a bell, and if you were lucky, that insight came _before_ the final exam.
[ Parent
| on HN ]
so, uh, you gonna tell us the insight?
Maybe that it's "just" a change of basis, onto a basis made of orthogonal periodic functions.
Re:Demystifying Fourier Analysis
by franknstein on Thursday November 17, 2022 @06:16PM
(#33647343)
Change of bases being done with orthogonal projection derived from defining scalar product of two functions via finite integral of product of two functions: f dot g = integral f(x)g(x)dx over some interval.