Problemi relativi al moto di un punto su una sfera riferita a coordinate ellittiche sferiche.
In this paper we study the non-steady isoentropic magneto-gasdynamics equations, when the involved quantities are each one a product of a function only of time by a function only of the coordinates. The solution of problem is reduced to the second order ordinary differential equation. Besides we examine a few remarkable cases.
In this paper we state the equations for the relative equilibrium of a mass of charged particles (electrons) subject to its own gravitation, uniformly rotating around an axis. Then we examine some particular cases.
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