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, being, essence, notion, selection, time, variation }
Symmetric Difference
$$A \ominus B =$$
{ Inheritance, being, essence, notion, selection, time, variation }
Difference
$$A - B =$$
{ Inheritance, selection, time, variation }
Difference
$$B - A =$$
{ being, essence, notion }
Cartesian Product
$$A \times B =$$
{ (Inheritance, being),
(Inheritance, essence),
(Inheritance, notion),
(selection, being),
(selection, essence),
(selection, notion),
(time, being),
(time, essence),
(time, notion),
(variation, being),
(variation, essence),
(variation, notion) }
Georg Wilhelm Friedrich Hegel