Union
$$A \cup B =$$
{ agape, awareness, decision, eros, ludus, mania, pragma, recognition, recollection, storge }
Symmetric Difference
$$A \ominus B =$$
{ agape, awareness, decision, eros, ludus, mania, pragma, recognition, recollection, storge }
Difference
$$B - A =$$
{ agape, eros, ludus, mania, pragma, storge }
Cartesian Product
$$A \times B =$$
{ (awareness, agape),
(awareness, eros),
(awareness, ludus),
(awareness, mania),
(awareness, pragma),
(awareness, storge),
(decision, agape),
(decision, eros),
(decision, ludus),
(decision, mania),
(decision, pragma),
(decision, storge),
(recognition, agape),
(recognition, eros),
(recognition, ludus),
(recognition, mania),
(recognition, pragma),
(recognition, storge),
(recollection, agape),
(recollection, eros),
(recollection, ludus),
(recollection, mania),
(recollection, pragma),
(recollection, storge) }
Color wheel theory of love