Equality
$$A \neq B$$
A is not equal to B
Subset
$$A \not\subseteq B$$
A is not a subset of or equal to B
Superset
$$A \not\supseteq B$$
A is not a superset of or equal to B
Intersection
$$A \cap B =$$
{ }
Union
$$A \cup B =$$
{ afraid, angry, disgusted, grouping, happy, sad, surprised, symmetry }
Symmetric Difference
$$A \ominus B =$$
{ afraid, angry, disgusted, grouping, happy, sad, surprised, symmetry }
Difference
$$A - B =$$
{ grouping, symmetry }
Difference
$$B - A =$$
{ afraid, angry, disgusted, happy, sad, surprised }
Cartesian Product
$$A \times B =$$
{ (grouping, afraid),
(grouping, angry),
(grouping, disgusted),
(grouping, happy),
(grouping, sad),
(grouping, surprised),
(symmetry, afraid),
(symmetry, angry),
(symmetry, disgusted),
(symmetry, happy),
(symmetry, sad),
(symmetry, surprised) }
Paul Ekman