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
$$A \cup B =$$
{ Inheritance, causal, gross, selection, subtle, time, variation }
Symmetric Difference
$$A \ominus B =$$
{ Inheritance, causal, gross, selection, subtle, time, variation }
Difference
$$A - B =$$
{ Inheritance, selection, time, variation }
Difference
$$B - A =$$
{ causal, gross, subtle }
Cartesian Product
$$A \times B =$$
{ (Inheritance, causal),
(Inheritance, gross),
(Inheritance, subtle),
(selection, causal),
(selection, gross),
(selection, subtle),
(time, causal),
(time, gross),
(time, subtle),
(variation, causal),
(variation, gross),
(variation, subtle) }
Three Bodies Doctrine