1. The problem statement, all variables and given/known data
Hi, Please see attached.
I am trying to show the second equality , expressing all as a total derivative (I can then show that )
2. Relevant equations
3. The attempt at a solution
So the term is pretty obvious, simply using the chain rule. It is the first term I am stuck on.
So looking by the sign, it looks like we have done integration by parts twice.
My working so far is to go by parts initially as:
to get, since we are allowed to assume vanishing of the field at inifnity:
I am now stuck of what to do, I can't see a move that will get the desired expression for a choice of integration by parts, which makes me question whether this was the correct first move to make.
Many thanks in advance.
Quantum theory , variation of S is zero, integrate by parts Watch
- Thread Starter
- 11-01-2017 20:29
- 12-01-2017 12:01
The layout and presentation of your problem and working is very nice and clear, BTW.