In order to numerically solve the ordinary differential equation 𝑑𝑦/𝑑𝑡 = −𝑦 for 𝑡 > 0, with an initial condition 𝑦(0) = 1, the following scheme is employed Here, Δ𝑡 is the time step and 𝑦𝑛 = 𝑦(𝑛Δ𝑡) for 𝑛 = 0, 1, 2, …. This numerical scheme will yield a solution with non-physical oscillations for Δ𝑡 > ℎ. The value of ℎ is