Euler-Cromer ODE Python Routine - Stack Overflow
https://stackoverflow.com/questions/2629494013.10.2014 · I am using an Euler-Cromer scheme to calculate the position and velocity of Halley's comet. The script tries several values for a time-step (tau) for each value of initial velocity in a range. For each tau value, it runs through the Euler-Cromer routine and compares the total mechanical energy from the beginning of the orbit to the end of the first orbit's cycle.
Semi-implicit Euler method - Wikipedia
https://en.wikipedia.org/wiki/Semi-implicit_Euler_methodIn mathematics, the semi-implicit Euler method, also called symplectic Euler, semi-explicit Euler, Euler–Cromer, and Newton–Størmer–Verlet (NSV), is a modification of the Euler method for solving Hamilton's equations, a system of ordinary differential equations that arises in classical mechanics. It is a symplectic integrator and hence it yields better results than the standard Euler method.