Union
$$A \cup B =$$
{ anal, analyze, control, define, genital, improve, latency, measure, oral, phallic }
Symmetric Difference
$$A \ominus B =$$
{ anal, analyze, control, define, genital, improve, latency, measure, oral, phallic }
Cartesian Product
$$A \times B =$$
{ (analyze, anal),
(analyze, genital),
(analyze, latency),
(analyze, oral),
(analyze, phallic),
(control, anal),
(control, genital),
(control, latency),
(control, oral),
(control, phallic),
(define, anal),
(define, genital),
(define, latency),
(define, oral),
(define, phallic),
(improve, anal),
(improve, genital),
(improve, latency),
(improve, oral),
(improve, phallic),
(measure, anal),
(measure, genital),
(measure, latency),
(measure, oral),
(measure, phallic) }
Psychosexual development