Geodesic
Analytic classification of singularities in the generalized Kowalevski case
Vestnik Udmurtskogo universiteta. Matematika, mehanika, kompʹûternye nauki, no. 2 (2010), pp. 19-28 Cet article a éte moissonné depuis la source Math-Net.Ru

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In the problem of motion of the Kowalevski top on two constant fields (the A. G. Reyman–M. A. Semenov-Tian-Shansky case) the type of all critical points of the momentum map is calculated.
Keywords: integrable Hamiltonian system, momentum map, bifurcation diagram, type of non-degenerate singularity. 
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P. E. Ryabov; M. P. Kharlamov. Analytic classification of singularities in the generalized Kowalevski case. Vestnik Udmurtskogo universiteta. Matematika, mehanika, kompʹûternye nauki, no. 2 (2010), pp. 19-28. http://geodesic.mathdoc.fr/item/VUU_2010_2_a1/

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