Just as a quick note: I'm a counterexample to the assertion that anyone who needs a basic explanation of Fourier Series doesn't know enough maths to understand

Just as a quick note: I'm a counterexample to the assertion that anyone who needs a basic explanation of Fourier Series doesn't know enough maths to understand the primer. I've got a strong (pure) mathematical background (degree in Maths & Philosophy from Oxford), and am now doing a PhD in CS, but my degree was entirely pure maths, and I never did any applied calculus. Admittedly, this isn't a common background, but one of the joys of writing on the internet is that you can write for whatever audience you choose! Jeremy: thanks very much for providing these primers! For me, they've been great: there are lots of areas of maths which I've not looked at, and for a while I'd been wanting a good introduction to them which was at the right level for me: i.e. mathematically clear, without having to go into too much background, and these have been great at that.