AMS                     AMS Adaptive Multilevel Splitting estimator for
                        rare-event option payoffs.
simulate_AMS            simulate_AMS Monte Carlo simulation of price
                        paths under: 1 = Black<e2><80><93>Scholes
                        (exact solution) 2 = Heston (Euler
                        discretisation) 3 = Heston (Milstein
                        discretisation) 4 = Heston
                        (Quadratic<e2><80><93>Exponential scheme,
                        Andersen 2008)
