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Question: Issues with Variational Derivative and Commutator

Question:Issues with Variational Derivative and Commutator

WA573 80 Maple 2022
calculus-of-variations commutator lagrangian
November 01 2024
0

I’m working on deriving the equation of motion (16) from equation (9) (see attached image), but I’ve encountered a couple of issues in Maple. i) The variational derivative of Lagrangian, and ii) the commutator is zero, which isn’t expected.

How do we fix these issues? Are there any specific packages regarding the construction of Lagrangian?

VariationDerivative.mw
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