Geodesic
On integrability of the Euler--Poisson equations
Fundamentalʹnaâ i prikladnaâ matematika, Tome 13 (2007) no. 1, pp. 45-59

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We consider a special case of the Euler–Poisson system of equations, describing the motion of a rigid body around a fixed point. We find 44 sets of stationary solutions near which the system is locally integrable. Ten of them are real. We study also the number of these complex stationary solutions in 3-dimensional invariant manifolds of the system. We find that the number is 4, 2, 1, or 0. 
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     title = {On integrability of the {Euler--Poisson} equations},
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A. D. Bruno; V. F. Edneral. On integrability of the Euler--Poisson equations. Fundamentalʹnaâ i prikladnaâ matematika, Tome 13 (2007) no. 1, pp. 45-59. http://geodesic.mathdoc.fr/item/FPM_2007_13_1_a3/