A QTT-compressed finite element method with symplectic time integration solves the 1D wave equation with exponential accuracy in the mesh level and energy error near machine precision.
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Symplectic QTT-FEM solution of the one-dimensional acoustic wave equation in the time domain
A QTT-compressed finite element method with symplectic time integration solves the 1D wave equation with exponential accuracy in the mesh level and energy error near machine precision.