The probability distribution of the average relative distance between   two points in a dynamical chain
  Subject of this letter is the dynamics of a chain obtained performing the continuous limit of a system of links and beads. In particular, the probability distribution of the relative position between two points of the chain averaged over a given interval of time is computed. The physical meaning of the obtained result is investigated in the limiting case of a stiff chain. 
Franco Ferrari, Jaroslaw Paturej, Thomas A. Vilgis and Tomasz Wydro