TY - JOUR A1 - Vera López, Juan Antonio T1 - Soluciones de equilibrio en un problema generalizado del de Lagrange-Poisson: condiciones necesarias y suficientes de estabilidad Y1 - 2003 SN - 1132-6360 UR - http://hdl.handle.net/10317/453 AB - In this paper, we consider the problem of motion of a symmetrical gyrostat with a fixed point in a Newtonian force field, where the potential function adopts the form U = U(K3), the gyrostatic momentum and the position vector of the center of mass are on the axis of symmetry. First, we obtain the equilibrium positions of this problem; then, by means of the Energy-Casimir method, we give sufficient conditions of stability for some of these equilibria and, by spectral methods, we obtain necessary conditions of stability. The obtained results generalize the previous papers [7], [8],[9], [1] and [2]. KW - Matemática Aplicada KW - Lagrange-Poisson KW - Giróstato simétrico LA - spa PB - Servicio de Publicaciones de la Universidad de Zaragoza ER -