Union
$$A \cup B =$$
{ agape, charity, chastity, diligence, eros, humility, kindness, ludus, mania, patience, pragma, storge, temperance }
Symmetric Difference
$$A \ominus B =$$
{ agape, charity, chastity, diligence, eros, humility, kindness, ludus, mania, patience, pragma, storge, temperance }
Cartesian Product
$$A \times B =$$
{ (agape, charity),
(agape, chastity),
(agape, diligence),
(agape, humility),
(agape, kindness),
(agape, patience),
(agape, temperance),
(eros, charity),
(eros, chastity),
(eros, diligence),
(eros, humility),
(eros, kindness),
(eros, patience),
(eros, temperance),
(ludus, charity),
(ludus, chastity),
(ludus, diligence),
(ludus, humility),
(ludus, kindness),
(ludus, patience),
(ludus, temperance),
(mania, charity),
(mania, chastity),
(mania, diligence),
(mania, humility),
(mania, kindness),
(mania, patience),
(mania, temperance),
(pragma, charity),
(pragma, chastity),
(pragma, diligence),
(pragma, humility),
(pragma, kindness),
(pragma, patience),
(pragma, temperance),
(storge, charity),
(storge, chastity),
(storge, diligence),
(storge, humility),
(storge, kindness),
(storge, patience),
(storge, temperance) }
Color wheel theory of love