推延
发表于 2025-4-1 03:19:31
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推迟
发表于 2025-4-1 09:48:54
https://doi.org/10.1007/978-3-319-24612-3onventional, that is, differential, form. More often than not, the procedure involves the minimization of integrals containing unknown functions and their derivatives, without first deriving from these integrals equivalent (the so-called Euler-Lagrange) differential equations.