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A mathematical proof concerning vector triple product is developed.
Then, the relation between the e-permutation symbol and the Kronecker delta is
obtained.
| Attachment | Size |
|---|---|
| vector_triple_pro.pdf | 73.6 KB |
I think this is well known
I think this is well known Lagrange formula (so called 'BAC minus CAB'). So the purporse of attached article is unclear.
The proof
It is well known, indeed. Furthermore, there are several proofs for this identity. The purpose is to share this particular proof that, in my best knowledge, is original and does not depend on a reference system.