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doi: 10.1007/bf02413316
On voit done que la condition necessaire pour que les series (2) puissent representer les integrales generales du systeme d'equations differentielles (1), n'est remplie que si les constantesA, B, C, x0,y0,z0 satisfont a l'une des quatre conditions suivantes: $$A = B = C,$$ (1) $$x_0 = y_0 = z_0 = o,$$ (2) $$A = B, x_0 = y_0 = o,$$ (3) $$A = B = 2C, z_0 = o.$$ (4)
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