A-]0 REACTION WITH DIFFERENT INITIAL PATTERNS(B)

We present a detailed study of the chemical reaction A + B --> 0 in tw o dimensions for different initial distributions of reactants as chara cterized by the structure function. We argue that the long-wavelength components of the initial fluctuations determine the long-time decay o f the reactant density. Numerical simulations of the coarse grained re action-diffusion dynamics agree with analytical predictions.