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2025-05-20 12:22:36 UTC
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Bartosz Milewski on Nostr: Yes, I'm also used to up/down summation-- I had to force myself to lower them all ...

Yes, I'm also used to up/down summation-- I had to force myself to lower them all ;-).

A quick check for this formula is to realize that both sides must be anti-symmetric in free indices, and that \(\epsilon_{1 2 3}\}\) is equal to one.