Triple scalar product
From AMS Glossary
triple scalar product
The scalar A · (B × C) written (ABC) or [ABC], where A, B, and C are any three vectors.
The dot denotes a scalar product and the cross a vector product. When A, B, and C are written in terms of their components along the x, y, and z axes of the rectangular Cartesian coordinates, that is, A = a1i + a2j + a3k, B = b1i + b2j + b3k, and C = c1i + c2j + c3k, the triple scalar product is the determinant
Any cyclic change among the vectors in a triple product does not alter its value.