1209.0583 (Tai-jun Chen et al.)

Higher derivative theories with constraints: A strengthening of
Ostrogradski's Theorem    [PDF]

Tai-jun Chen, Eugene A. Lim

We prove that the linear instability in a non-degenerate higher derivative theory, the Ostrogradski instability, cannot be removed by the addition of constraints.

View original: http://arxiv.org/abs/1209.0583