Is (T(adsbygoogle = window.adsbygoogle || []).push({}); _{ii})^{2}equivalent to (∑_{i = 1}^{n}T_{ii})^{2}? That is, when you encounter parentheses with Einstein summation, you perform the summation first and then apply any mathematical operations indicated by the parentheses? The solutions manual gives a solution to a problem I've been working out seems to indicate this is the case, but I haven't seen it stated as a rule.

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# I Summation convention with expressions containing parentheses

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