On 2016-04-06 23:04, Henry Baker wrote:

Aren't epicycles the earliest version of Fourier series?

Yes, http://gosper.org/gibbstriangle.gif --rwg

https://en.wikipedia.org/wiki/Deferent_and_epicycle

Now if someone could show that Ptolemy invented the FFT...

At 05:04 PM 4/6/2016, Marc LeBrun wrote:

...

Or there's Gosper's observation that enough epicycles actually could have accounted for any observed orbit...