@MISC{Tsiganov04onintegrable, author = {A. V. Tsiganov}, title = {On integrable system on S 2 with the second integral quartic in the momenta.}, year = {2004} }
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Abstract
We consider integrable system on the sphere S 2 with an additional integral of fourth order in the momenta. At the special values of parameters this system coincides with the Kowalevski-Goryachev-Chaplygin system. 1