Discrete Hamiltonian Variational Integrators

Details Discrete Hamiltonian Variational Integrators Discrete Hamiltonian Variational Integrators

2010-01-09

arxiv.org/abs/1001.1408v1

Mathematics

Numerical Analysis

23 pages

Scientific paper

We consider the continuous and discrete-time Hamilton's variational principle on phase space, and characterize the exact discrete Hamiltonian which provides an exact correspondence between discrete and continuous Hamiltonian mechanics. The variational characterization of the exact discrete Hamiltonian naturally leads to a class of generalized Galerkin Hamiltonian variational integrators, which include the symplectic partitioned Runge-Kutta methods. We also characterize the group invariance properties of discrete Hamiltonians which lead to a discrete Noether's theorem.

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