Fig. 4From: The role of cell location and spatial gradients in the evolutionary dynamics of colon and intestinal cryptsThe penalty function \(F^{func}=b \sum _{i=0}^{n-1} p_{div}(i) (n-1-i)^{a}\). In (a) F func is plotted a function of variable a with \(b=\frac {1}{4}\). In (b) F func as a function of variable b with \(a=\frac {1}{4}\). Note that 0<F func<1Back to article page