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Results tagged with conventions
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user 61966
A convention is a set of agreed, stipulated, or generally accepted norms. It typically helps common efficiency or understanding but is not required, as opposed to a strict standard or protocol.
8
votes
3
answers
4k
views
Sign of the totally anti-symmetric Levi-Civita tensor $\varepsilon^{\mu_1 \ldots}$ when rais...
I am confused with the sign we get when we want to raise or lower all indices of the totally anti-symmetric tensor of any rank. Take the metric to be mostly plus ($-+\ldots+$). Then is it
$$\varepsilo …
- 2,218
4
votes
1
answer
499
views
Confusion about square bracket notation in the the Kronecker delta symbol
I am not sure I understand what the short-hand anti-symmetrization means. I.e. I know that
$$\delta_{cd}^{[ab]} ~=~ \frac{1}{2}(\delta_{c}^{a}\delta_{d}^{b} - \delta_{c}^{b}\delta_{d}^{a})$$
but how …
- 2,218