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
$$A \cup B =$$
{ Assess, Execute, Plan, Re-evaluate, Stop, fetishism, monotheism, polytheism }
Symmetric Difference
$$A \ominus B =$$
{ Assess, Execute, Plan, Re-evaluate, Stop, fetishism, monotheism, polytheism }
Difference
$$A - B =$$
{ Assess, Execute, Plan, Re-evaluate, Stop }
Difference
$$B - A =$$
{ fetishism, monotheism, polytheism }
Cartesian Product
$$A \times B =$$
{ (Assess, fetishism),
(Assess, monotheism),
(Assess, polytheism),
(Execute, fetishism),
(Execute, monotheism),
(Execute, polytheism),
(Plan, fetishism),
(Plan, monotheism),
(Plan, polytheism),
(Re-evaluate, fetishism),
(Re-evaluate, monotheism),
(Re-evaluate, polytheism),
(Stop, fetishism),
(Stop, monotheism),
(Stop, polytheism) }
Law of three stages