Explanation of exponential sums

The exponential sum plots on this site are the partial sums of

\sum_{n=0}^N \exp\left( 2\pi i \left( \frac{n}{m} + \frac{n^2}{d} + \frac{n^3}{y} \right ) \right )

where m is the month, d is the day, and y is the last two digits of the year.

See also this blog post.

Back to the exponential sum page.


John D. Cook photo


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