Union
$$A \cup B =$$
{ advertise, agape, analyze, contextualize, eros, express, identify, learn, localize, philios, storge }
Symmetric Difference
$$A \ominus B =$$
{ advertise, agape, analyze, contextualize, eros, express, identify, learn, localize, philios, storge }
Difference
$$A - B =$$
{ advertise, analyze, contextualize, express, identify, learn, localize }
Cartesian Product
$$A \times B =$$
{ (advertise, agape),
(advertise, eros),
(advertise, philios),
(advertise, storge),
(analyze, agape),
(analyze, eros),
(analyze, philios),
(analyze, storge),
(contextualize, agape),
(contextualize, eros),
(contextualize, philios),
(contextualize, storge),
(express, agape),
(express, eros),
(express, philios),
(express, storge),
(identify, agape),
(identify, eros),
(identify, philios),
(identify, storge),
(learn, agape),
(learn, eros),
(learn, philios),
(learn, storge),
(localize, agape),
(localize, eros),
(localize, philios),
(localize, storge) }
The Four Loves