S. Simons et D. Harper, A CLASS OF SOLUTIONS OF THE TIME-DEPENDENT REACTION-DIFFUSION EQUATION FOR THE PROCESSES A-]A AND A+A-]0(A), Journal of physics. A, mathematical and general, 27(18), 1994, pp. 120000663-120000667
Consideration is given to the treatment of the nonlinear partial diffe
rential equation describing the diffusion of an assembly of particles
which simultaneously coagulate or annihilate. It is shown how a class
of solutions may be obtained in terms of the solutions of an ordinary
differential equation and detailed application is made to the case of
an initially localized particle distribution.