Figure 4.

Wound healing simulations with parameters Λ = 2.0, δ = 1.0, ρ = 3.0, f(p) = p(1.0 − p), g(p) = p(Λ − p), h(x) = 9.0 arctan(100.0x)/(4.0x arctan 100.0), and initial data ϕ₀(x) = 1.0 − 0.4 exp(−(0.1x)¹⁰) (top left), ϕ₀(x) = 1.0 − 0.95 exp(−(3x)¹²) (top right), ϕ₀(x) = 1.0 − 0.5 exp(−(0.2x)¹²) (bottom left) and ϕ₀(x) = 1.0 − 0.95 exp(−(0.1x)¹⁰) (bottom right). The wounds top left and top right both close but the wound bottom right which has the same width as the first and the same depth as the second fails to close. The widest wound, bottom left, also closes.