An unconventional symplectic integrator of W. Kahan

  • Sanz-Serna J
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Among other unconventional numerical methods, W. Kahan has suggested a discretization of a simple Lotka-Volterra system with the property that the computed points do not spiral. We explain this behaviour by showing that Kahan's method is symplectic with respect to a noncanonical symplectic structure. © 1994.

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