e obtained via
      </p>
<p>
        <span class="emphasis"><em>d &#948; x / dt = J(x) &#948; x</em></span>
      </p>
<p>
        where <span class="emphasis"><em>J</em></span> is the Jacobian of the system under consideration.
        <span class="emphasis"><em>&#948; x</em></span> can also be interpreted as a perturbation of the original
        system. In principle <span class="emphasis"><em>n</em></span> of these perturbations exist,
        they form a hypercube and evolve in the time. The Lyapunov e