Fig 8. The decay of the three tumors for different initial conditions.
The immune cells are placed in the neighborhood of the tumors for values of the angles γ = {π/6, π/2, π, 3π/2, 2π} and we iterate the CA. The CA actions corresponding to the lymphocytes have parameter values θlys = 0.3, θrec = 0.5 and θinc = 0.5. The tumor cells dynamics has been frozen, and the parameters related to the diffusion of nutrients are the same as those appearing in previous figures. (a) The decay of the spherical tumor for the different initial conditions. (b) The decay of the papillary tumor for the different initial conditions. (c) The decay of the filamentary tumor for the different initial conditions. As less immune cells are placed in the vicinity of the tumors as initial conditions (from γ = 2π to γ = π/6), the parabolic decay transforms into a more or less linear type of decay.