Re: [math-fun] big sunflowers

Most responses to my post have focussed on the frequency-domain, but what about the specific patterns (circles, hyperbolas, etc.) that we see in the spatial-domain? At some point these need to be explained. In fact, even leaving aside sunflowers, I'd like to see a nice mathematical explanation of Moire patterns of the conventional kind. Has such a thing ever been written? You'd think so, but I wasn't able to find one anywhere on the web last time I checked! Jim Propp