Union
$$A \cup B =$$
{ Anthropology, Economics, Geography, Political science, Psychology, Sociology, logopoeia, melopoeia, phanopoeia }
Symmetric Difference
$$A \ominus B =$$
{ Anthropology, Economics, Geography, Political science, Psychology, Sociology, logopoeia, melopoeia, phanopoeia }
Difference
$$B - A =$$
{ Anthropology, Economics, Geography, Political science, Psychology, Sociology }
Cartesian Product
$$A \times B =$$
{ (logopoeia, Anthropology),
(logopoeia, Economics),
(logopoeia, Geography),
(logopoeia, Political science),
(logopoeia, Psychology),
(logopoeia, Sociology),
(melopoeia, Anthropology),
(melopoeia, Economics),
(melopoeia, Geography),
(melopoeia, Political science),
(melopoeia, Psychology),
(melopoeia, Sociology),
(phanopoeia, Anthropology),
(phanopoeia, Economics),
(phanopoeia, Geography),
(phanopoeia, Political science),
(phanopoeia, Psychology),
(phanopoeia, Sociology) }
Ezra Pound's Three Kinds of Poetry