**Gauss Dynamics:**- Write a Gaussian MD program to simulate the following system:

3 particles without pairwise interaction are moving in a one-dimensional harmonic potential. The sum of their kinetic energies is kept constant. Draw the trajectory of the first particle. Use Runge-Kutta.

**Nosé-Hoover thermostat:**- The equations of motion of the Nosé oscillator with
are

(7.23) (7.24) (7.25)

Integrate this set of equations, using Runge-Kutta, and draw the trajectory.

F. J. Vesely / University of Vienna