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
$$A \cup B =$$
{ high mass consumption, interpretant, object, pre-conditions, sign, take-off, technological maturity, traditional society }
Symmetric Difference
$$A \ominus B =$$
{ high mass consumption, interpretant, object, pre-conditions, sign, take-off, technological maturity, traditional society }
Difference
$$A - B =$$
{ high mass consumption, pre-conditions, take-off, technological maturity, traditional society }
Difference
$$B - A =$$
{ interpretant, object, sign }
Cartesian Product
$$A \times B =$$
{ (high mass consumption, interpretant),
(high mass consumption, object),
(high mass consumption, sign),
(pre-conditions, interpretant),
(pre-conditions, object),
(pre-conditions, sign),
(take-off, interpretant),
(take-off, object),
(take-off, sign),
(technological maturity, interpretant),
(technological maturity, object),
(technological maturity, sign),
(traditional society, interpretant),
(traditional society, object),
(traditional society, sign) }
Rostow's stages of growth