New approach to study gravitational stability of the solutions to the   Einstein equations
  Here we propose a new method to study gravitational stability of the solutions to the Einstein equations. This method uses the canonical superenergy density and it is different from approaches already used (Lyapunov's stability, dynamical systems). Our method is very alike to the procedure of finding the stable minima of the interior energy U for a dynamical system. 
Janusz Garecki
gr-qc