Karl Fritiof Sundman
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Karl Frithiof Sundman (1873 – 1949) was a Finnish mathematician who used analytic methods to prove the existence of a convergent infinite series solution to the three-body problem in 1906 and 1909.

He was awarded the Pontécoulant prize by the French Academy of Science in 1913 for this work. He also published a paper on regularization methods in mechanics in 1912.

The Sundman crater on the Moon is named after him, as well as the asteroid 1424 Sundmania.

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