  The kinetics of the q-state Potts model in the zero temperature limit in one
dimension is analyzed exactly through a generalization of the method of empty
intervals, previously used for the analysis of diffusion-limited coalescence,
A+A->A. In this new approach, the q-state Potts model, coalescence, and
annihilation (A+A->0) all satisfy the same diffusion equation, and differ only
in the imposed initial condition.
