Finite Time Equipartition for Second-order Hyperbolic Systems

A sufficient condition for equipartition of energy for secondorder hyperbolic systems in three space variables is given.The condition states that the system should evolve in such away that the time derivative of a solution of the form (u₁,0)^T is connected with the space derivatives of a solution ofthe form (0, u₂)^T and the time derivative of (0, u₂)^T is connectedwith the space derivatives of (u₁, 0)^T.