y=lab.cross(a,b) returns the cross product of the tensors a and b. a and b must be 3 element vectors.

y=cross(a,b) returns the cross product of a and b along the first dimension of length 3.

y=cross(a,b,n), where a and b returns the cross product of vectors in dimension n of a and b. a and b must have the same size, and both a:size(n) and b:size(n) must be 3.