Integration methods.
| Member | Value | Description | 
|---|---|---|
| eBulirschStoer | 0 | Bulirsch-Stoer: integration method based on Richardson extrapolation with automatic step size control. | 
| eGaussJackson | 1 | Gauss-Jackson: 12th order Gauss-Jackson integration method for second order ODEs. | 
| eRK4 | 2 | RK 4: Runge-Kutta integration method of 4th order with no error control for the integration step size. | 
| eRKF78 | 3 | RKF 7(8): Runge-Kutta-Fehlberg integration method of 7th order with 8th order error control for the integration step size. | 
| eRKV89Efficient | 4 | RKV 8(9) Efficient: Runge-Kutta-Verner integration method of 8th order with 9th order error control for the integration step size, using the efficient coefficient set. | 





