I have managed to get to the end of Chapter 6 and have done almost all of the exercises (I didn't get anywhere with exercise 5.6 (d) and have seen the Cesarth/TSny exchange and still don't feel I have a satisfactory solution...) but I have hit a bit of a wall with Exercise 7.1 (a).(adsbygoogle = window.adsbygoogle || []).push({});

First question is 'Why choose e^{φ}instead of just φ in the integral for I ?'

Next question 'Can anyone give me a hint as to how I should be approaching this?'

I've attached my manuscript working which achieves a result of 0 = 0 (well at least it is consistent) but no differential equations.

Regards

TerryW

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# Choice of Lagrangian for scalar potential in MTW Chapter 7

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