triple cross product

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Defines:
Lagrange's formula
Synonym:
vector triple product, triple vector product
Type of Math Object:
Definition
Major Section:
Reference
Parent:
Groups audience:

Mathematics Subject Classification

triple cross product

The expansion formula agrees with a simple nemotechnic rule:
"exterior dot far times near minus exterior dot near times far".
That rule works if $\vec{a}$ is in left or right side.

Re: triple cross product

Thank you, it is a good mnemonic -- I think I add it to the object, if you give permission!
Jussi

Re: triple cross product

Dear Mr. pahio,
Of course yes!! For me is an honor.
Best regards,
Pedro

triple vector cross product

Hi, It would be nice to have some geometric proof of this for offering some insight.

"geometric proof"

See http://it.wikipedia.org/wiki/Prodotto_misto (Semplificazioni) and http://es.wikipedia.org/wiki/Doble_producto_vectorial (Demostración).