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Srinivasa Ramanujan

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Srinivasa Ramanujan was an Indian mathematician, 1887-1920, noted for his work in number theory and combinatorics.

Among his many accomplishments are the formula

\frac{1}{\pi} = \frac{2\sqrt{2}}{9801} \sum^\infty_{k=0} \frac{(4k)!(1103+26390k)}{(k!)^4 396^{4k}}

and the explicit formula for the partition function.

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