The heat map of tumor growth.

Tumor growth, for the possible size-composition (x, g) pairs, where the types’ growth rates are modulated by a pure coordination game. Type 1’s intrinsic growth rate, r₁, is larger and its death rate, c₁, is lower, therefore its fitness peak is higher, but a pure type 2 tumor also has a fitness peak. Parameters: r₁ = 0.25, r₂ = 0.17, d₁ = d₂ = 0, K = 100, T = 10, α = 2, c₁ = 0.05, c₂ = 0.1, m₁ = m₂ = 0.01.