- /*
- * according to mr. nordlund, we dont need to take the
- * sum over all atoms now, as 'this is centered' around
- * atom i ...
- * i am not quite sure though! there is a not vanishing
- * part even if f_c_ik is zero ...
- * this analytical potentials suck!
- * switching from mc to md to dft soon!
- */