Antisymmetric Tensor Function

ε(i, j, k) Returns the completely antisymmetric tensor of rank 3. Result is 0 if any two arguments are the same, 1 for even permutations, −1 for odd permutations. (To type ε, press e[Ctrl]g.)

Arguments:

• i, j, and k must be dimensionless integers between ORIGIN and ORIGIN + 2, inclusive.

Notes:

• The antisymmetric tensor of rank 3 determines the number of pairwise switches from [i, j, k] to the sequence [0, 1, 2]. If the number of times is even, the function returns 1. If the number of times is odd, the function returns −1.