Union
$$A \cup B =$$
{ anal, genital, high mass consumption, latency, oral, phallic, pre-conditions, take-off, technological maturity, traditional society }
Symmetric Difference
$$A \ominus B =$$
{ anal, genital, high mass consumption, latency, oral, phallic, pre-conditions, take-off, technological maturity, traditional society }
Difference
$$B - A =$$
{ high mass consumption, pre-conditions, take-off, technological maturity, traditional society }
Cartesian Product
$$A \times B =$$
{ (anal, high mass consumption),
(anal, pre-conditions),
(anal, take-off),
(anal, technological maturity),
(anal, traditional society),
(genital, high mass consumption),
(genital, pre-conditions),
(genital, take-off),
(genital, technological maturity),
(genital, traditional society),
(latency, high mass consumption),
(latency, pre-conditions),
(latency, take-off),
(latency, technological maturity),
(latency, traditional society),
(oral, high mass consumption),
(oral, pre-conditions),
(oral, take-off),
(oral, technological maturity),
(oral, traditional society),
(phallic, high mass consumption),
(phallic, pre-conditions),
(phallic, take-off),
(phallic, technological maturity),
(phallic, traditional society) }
Psychosexual development