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发表于 2025-3-26 23:16:37
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发表于 2025-3-27 20:05:14
Nichtlineare Differentialgleichungenequations for which the Lagrangian viewpoint, even if applicable, no longer is appropriate or natural to the problem. In this case, the Hamiltonian formulation of systems of evolution equations assumes the natural variational role for the system.
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