Hi all,(adsbygoogle = window.adsbygoogle || []).push({});

I am trying to follow the derivation by Carroll of the parallel propagator in these notes, beginning page 66 or so.

My question is with the integral in equation 3.40.

1) why is it that this is an integral over a simplice, and not an n-cube (which the limits of integration seem to suggest)?

2) why is it that [itex]\eta_n \geq \eta_{n-1}\geq \ldots \geq \eta_1[/itex] so that path ordering must take place? (See between equations 3.40 and 3.41 for discussion.)

Cheers,

Ianhoolihan

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# Path ordered integral over simplices?

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