Figure 1.

Left: Solution curves W(z, t) at selected times: At t = 0 (blue dashed), for t < t_g (red), for t = t_g (black), and for t > t_g (blue). W(t, 1) for t > t_g (blue star). Right: Reactive sites in sol R_s (blue) and in gel R_g (red). Mass in sol θ_s (blue-dashed) and in gel θ_g (red-dashed). f = 3, $c_1(0)=m_0=\frac{2}{3},t_g=\frac{1}{2}$.