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Left-right arrow in Einstein equation

Context: Undergrad
Thread starter etotheipi
Start date Apr 3, 2021
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Einstein Einstein equation

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etotheipi

Thread starter
Apr 3, 2021

#1

Short, probably stupid, question; what does this left-right arrow ##a \leftrightarrow b## at the bottom-right mean? [It's this paper for ref.]

Does it just mean the last term repeated, except this time with ##a## and ##b## indices exchanged? Thanks.

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anuttarasammyak

Gold Member

Apr 3, 2021

#2

LHS is symmetric as for a nd b so RHS is also. So your thought seems reasonable.

Demystifier

Science Advisor

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Apr 10, 2021

#3

Why is this thread on the Last week's most popular topics list?

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