There's a question about Fourier series on physics.SE that seems purely mathematical in nature - at least, it's definitely off-topic on the physics site, and seems like it would be on topic here. But the topic might already covered by other existing questions, e.g. this one and this one. So I figured I'd ask:
Would this question from physics.SE be appropriate at math.SE?
If not, should I migrate it anyway and flag it to be closed here?