(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Below equation 10.77, Zwiebach claims that the gauge epsilon = i A^+/p^+ makes the vector potential component A^+ vanish.

However, I thought epsilon was supposed to be infinitesimal and a constant, both of which are violated by setting epsilon equal to the expression?

2. Relevant equations

3. The attempt at a solution

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# Homework Help: Zwiebach page 178

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