Titlebook: Applications of Functional Analysis in Engineering; J. L. Nowinski Book 1981 Springer Science+Business Media New York 1981 Finite.Hilbert

推延

推遲

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.