Lagrange Equation: Solution for J(q_1,...,q_n)

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SUMMARY

The discussion centers on the Lagrange Equation, specifically the functional J(q_1,...,q_n) defined as J(q_1,...,q_n)=∫_{t_0}^{t}L(q_1,...,q_n; \dot{q}_1,...,\dot{q}_n;t). Participants clarify that J is a functional dependent on the paths q_1(t), ..., q_n(t) rather than a direct function of the generalized coordinates q_1,...,q_n. The correct notation emphasizes that J should be expressed as J[q_1(t), ..., q_n(t)], highlighting its dependence on time-varying paths.

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For functional

[tex]J(q_1,...,q_n)=\int^{t}_{t_0}L(q_1,...,q_n;\dot{q}_1,...,\dot{q}_n;t)[/tex]

Why isn't [tex]J(q_1,...,q_n;\dot{q}_1,...,\dot{q}_n;t)[/tex]?
 
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I had an answer for you, but the TeX system stumped me, and I was unable to write it out. Sorry about that.
 
Last edited:
J is a functional, and not a function of the q's. It should be written as:
[tex] J[q_1(t), \ldots, q_n(t)][/tex]
 

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