CONFORMALLY SYMPLECTIC DYNAMICS and SYMMETRY OF THE LYAPUNOV SPECTRUM 
                                  by
               Maciej P. Wojtkowski and Carlangelo Liverani
               
ABSTRACT:
A generalization of the Hamiltonian formalism is studied
and the symmetry of the Lyapunov spectrum established
for the resulting systems.
The formalism is applied to the Gausssian isokinetic 
dynamics of 
interacting particles with hard core collisions and other systems.  

PUBLISHED IN:
Communication in Mathematical Physics, 194,1, pp. 47--60 (1998).