- #1
Breo
- 177
- 0
Who knows where this formula comes?
$$ e_i \otimes e_j + e_j \otimes e_i - \frac{2}{3}( \sum_{\substack{k}} e_k \otimes e_k
)\delta_{ij} $$
$$ e_i \otimes e_j + e_j \otimes e_i - \frac{2}{3}( \sum_{\substack{k}} e_k \otimes e_k
)\delta_{ij} $$