- #1

Hiero

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Is there a way to distinguish between these in Einstein’s summation notation?

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- Thread starter Hiero
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- #1

Hiero

- 322

- 68

Is there a way to distinguish between these in Einstein’s summation notation?

- #2

PAllen

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- #3

Dale

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So ##f(\Sigma x^{\mu}e_{\mu})## is ##f(x^{\mu}e_{\mu})## and ##\Sigma f(x^{\mu}e_{\mu})## is ##f(x^{\mu}e_{\nu})\delta^{\nu}_{\mu}##Is there a way to distinguish between these in Einstein’s summation notation?

- #4

Hiero

- 322

- 68

Oh wow, that’s clever! Thanks for the insight.So ##f(\Sigma x^{\mu}e_{\mu})## is ##f(x^{\mu}e_{\mu})## and ##\Sigma f(x^{\mu}e_{\mu})## is ##f(x^{\mu}e_{\nu})\delta^{\nu}_{\mu}##

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