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A comparison of a few numerical schemes for the integration of stochastic differential equations in the Stratonovich interpretation
David Garcia-Alvarez
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Three schemes, whose expressions are not too complex, are selected for the numerical integration of a system of stochastic differential equations in the Stratonovich interpretation: the integration methods of Heun, Milstein, and derivative-free Milstein. The strong (path-wise) convergence is studied for each method by comparing the final points after integrating with 2ⁿ and 2ⁿ⁻¹ time steps. We also compare the time that the computer takes to carry out the integration with each scheme. Putting both things together, we conclude that, at least for our system, the Heun method is by far the best performing one.
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