The symmetric difference ADeltaBA \\Delta BADeltaB is defined as:
AcupBA \\cup BAcupB
(A−B)cup(B−A)(A - B) \\cup (B - A)(A−B)cup(B−A)
AcapBA \\cap BAcapB
(AcapB)′(A \\cap B)'(AcapB)′