5.1.2 Godunov versus Strang operator splitting

The Godunov operator splitting from Eq. (212) where all operators are applied cyclically and with the same time-step might be improved in some cases by Strang operator splitting

$$q_{A/2}^{n,*} = q^{n} + \frac{\Delta t}{2} A(q^{n})$$

$$q_{A/2+B}^{n,**} = q_{A/2}^{n,*} + \Delta t B(q_{A/2}^{n,*})$$

$$q_{A+B}^{n+1} = q_{A/2+B}^{n,**} + \frac{\Delta t}{2} A(q_{A/2+B}^{n,**}) \enspace .$$ (213)