Die Methode der Gleichgewichtsbewegung als Approximationsverfahren

(Approximation by Moving Equilibrium). The analysis of multivariate
dynamical models can sometimes be considerably simplified by the
assumption that one or several variables move infinitely fast to
their equilibrium values. The method is known as the 'moving
equilibrium method'. Various dynamical theories that build on
equilibrated markets presuppose the validity of this method. The
method is discussed and a theorem -- the moving equilibrium theorem
-- is provided that establishes the validity of the approximation
in the linear case.