Union
$$A \cup B =$$
{ air, conjunctive, earth, fire, individuative-reflective, intuitive-projective, mythic-literal, primal, synthetic-conventional, universalizing, water }
Symmetric Difference
$$A \ominus B =$$
{ air, conjunctive, earth, fire, individuative-reflective, intuitive-projective, mythic-literal, primal, synthetic-conventional, universalizing, water }
Difference
$$B - A =$$
{ conjunctive, individuative-reflective, intuitive-projective, mythic-literal, primal, synthetic-conventional, universalizing }
Cartesian Product
$$A \times B =$$
{ (air, conjunctive),
(air, individuative-reflective),
(air, intuitive-projective),
(air, mythic-literal),
(air, primal),
(air, synthetic-conventional),
(air, universalizing),
(earth, conjunctive),
(earth, individuative-reflective),
(earth, intuitive-projective),
(earth, mythic-literal),
(earth, primal),
(earth, synthetic-conventional),
(earth, universalizing),
(fire, conjunctive),
(fire, individuative-reflective),
(fire, intuitive-projective),
(fire, mythic-literal),
(fire, primal),
(fire, synthetic-conventional),
(fire, universalizing),
(water, conjunctive),
(water, individuative-reflective),
(water, intuitive-projective),
(water, mythic-literal),
(water, primal),
(water, synthetic-conventional),
(water, universalizing) }
Classical element