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Point Transformations in the Lagrangian

  • #1

Homework Statement


Hi, I'm working on understanding how a time independent point transformation
gif.gif
. effects the Lagrangian and to see how what values are co and contra variant.


Homework Equations


Would these be correct formulations, or have I overlooked something?

The Attempt at a Solution


gif.gif

and
gif.gif

for Q = 0, from
gif.gif
 

Answers and Replies

  • #2
394
15
rtial%20L%7D%7B%5Cpartial%20q%7D%20%29%20%5Cfrac%7B%5Cpartial%20f%7D%7B%5Cpartial%20q*%7D%3D%200.gif
The left side seems ok. I don't know where the right side comes from, I mean the second factor of the left side.
 

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