Figure 3.

The optimal switching probability is unique. Part A shows the surfaces of estimated fixation probabilities p̂_fix(m₁,m₂) and p̂_fix(m₂, m₁). Here m̂_opt ≈ θ = 0.001 --- note that p̂_fix (m₁,0.001) ≥ p̂_fix (0.001,m₁) for all m₁ in the interval [0, 1]. Part B shows that there is a unique optimal value: m̂_opt ≈ = 0.001 is the only m₂ for which p̂_fix(m₁, m₂) ≥ p̂_fix(m₂, m₁) for all m₁ (solid line). It is also the only m₂ for which p̂_fix(m₁, m₂) ≥ 1/N for all m₁ (dotted line), and the only m₂ for which p̂_fix (m₂, m₁) ≤ 1/ N for all m₁ (dashed line).