What a transform actually is, the region of convergence and Bromwich inversion, the heat semigroup, Poisson summation and Paley-Wiener, the radial family of Hankel, Abel and Radon, exact transforms over finite groups and finite fields, and the time-frequency distributions.
Free to start · adaptive placement finds your level · reviews timed to your own forgetting.
Every idea is taught with motivation and a worked example before the drills, and an FSRS spaced-repetition engine schedules each review for the day its model predicts you would forget it. A short placement check finds what you already know, so you start Integral Transforms exactly where it's useful.