Equality
$$A \neq B$$
A is not equal to B
Subset
$$A \not\subseteq B$$
A is not a subset of or equal to B
Superset
$$A \not\supseteq B$$
A is not a superset of or equal to B
Intersection
$$A \cap B =$$
{ }
Union
$$A \cup B =$$
{ accumulating, cell division, interphase, reformulating, resting, trans-framing, uni-framing }
Symmetric Difference
$$A \ominus B =$$
{ accumulating, cell division, interphase, reformulating, resting, trans-framing, uni-framing }
Difference
$$A - B =$$
{ accumulating, reformulating, trans-framing, uni-framing }
Difference
$$B - A =$$
{ cell division, interphase, resting }
Cartesian Product
$$A \times B =$$
{ (accumulating, cell division),
(accumulating, interphase),
(accumulating, resting),
(reformulating, cell division),
(reformulating, interphase),
(reformulating, resting),
(trans-framing, cell division),
(trans-framing, interphase),
(trans-framing, resting),
(uni-framing, cell division),
(uni-framing, interphase),
(uni-framing, resting) }
Marvin Minsky