Union
$$A \cup B =$$
{ Inheritance, anger, anticipation, disgust, fear, joy, sadness, selection, surprise, time, trust, variation }
Symmetric Difference
$$A \ominus B =$$
{ Inheritance, anger, anticipation, disgust, fear, joy, sadness, selection, surprise, time, trust, variation }
Difference
$$B - A =$$
{ anger, anticipation, disgust, fear, joy, sadness, surprise, trust }
Cartesian Product
$$A \times B =$$
{ (Inheritance, anger),
(Inheritance, anticipation),
(Inheritance, disgust),
(Inheritance, fear),
(Inheritance, joy),
(Inheritance, sadness),
(Inheritance, surprise),
(Inheritance, trust),
(selection, anger),
(selection, anticipation),
(selection, disgust),
(selection, fear),
(selection, joy),
(selection, sadness),
(selection, surprise),
(selection, trust),
(time, anger),
(time, anticipation),
(time, disgust),
(time, fear),
(time, joy),
(time, sadness),
(time, surprise),
(time, trust),
(variation, anger),
(variation, anticipation),
(variation, disgust),
(variation, fear),
(variation, joy),
(variation, sadness),
(variation, surprise),
(variation, trust) }
Robert Plutchik