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Runge--Kutta methods determined from extended phase space methods for Hamiltonian systems

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arxiv 2308.06516 v1 pith:GQZQY2DX submitted 2023-08-12 math.NA cs.NAphysics.comp-ph

Runge--Kutta methods determined from extended phase space methods for Hamiltonian systems

classification math.NA cs.NAphysics.comp-ph
keywords methodrunge--kuttaextendedhamiltonianmethodsphaseprojectionspace
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We study two existing extended phase space integrators for Hamiltonian systems, the {\em midpoint projection method} and the {\em symmetric projection method}, showing that the first is a pseudosymplectic and pseudosymmetric Runge--Kutta method and the second is a monoimplicit symplectic Runge--Kutta method.

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