quadruple vector product

quadruple vector product

[kwə′drüp·əl ′vek·tər ‚präd·əkt]
(mathematics)
For any four vectors, the dot product of two derived vectors, one of which is the cross product of two of the original vectors, and the other of which is the cross product of the other two.
For any four vectors, the cross product of two derived vectors, one of which is the cross product of two of the original vectors, and the other of which is the cross product of the other two.