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arxiv: 0807.1516 · v3 · pith:FHC27D37new · submitted 2008-07-09 · 🧮 math.NA · cs.NA· math-ph· math.DG· math.DS· math.MP

Error analysis of variational integrators of unconstrained Lagrangian systems

classification 🧮 math.NA cs.NAmath-phmath.DGmath.DSmath.MP
keywords variationalanalysiserrorintegratorsblowingcompletedeficitdiscrete
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A complete error analysis of variational integrators is obtained, by blowing up the discrete variational principles, all of which have a singularity at zero time-step. Divisions by the time step lead to an order that is one less than observed in simulations, a deficit that is repaired with the help of a new past-future symmetry.

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