I know that this may have a useful application, but I find it very beautiful
per se! I once found a Java applet in which you could play with the first 5
or 6 fourier coeficients and automatically you would see the periodic
function graphed. This was kind of the same thing but in 2D. I spent lots of
time playing with that little applet.

I've always liked graphics of converging series.

Congratulations,

Fernando.

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