Reference: OPSET
{ X1, X2, ..., Xn } returns the set of the elements X1, X2, ..., and Xn, which might be real or complex numbers, vectors, matrices, strings, or pixmaps, but not booleans, sounds, tables or other sets.
{ X1, X2, ..., Xn } returns the set of the elements X1, X2, ..., and Xn, which might be real or complex numbers, vectors, matrices, strings, or pixmaps, but not booleans, sounds, tables or other sets.