I keep writing code that needs the Levi-Civita symbol, i.e.:
\epsilon_{ijk} = { 1 if (i,j,k) is an even permutation, -1 if (i,j,k) is an
odd permutation, otherwise 0 }It is used frequently in physics, so I keep expecting it to be in Julia's stdlib, perhaps under a different name (in Mathematica, it is called Signature[]). But, if it is there, I haven't found it yet. Is it there and I just can't find it?
