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
$$A \cup B =$$
{ disease, earthquake, fire, flood, hurricane, lightning, meteor, parallel, series, volcano }
Symmetric Difference
$$A \ominus B =$$
{ disease, earthquake, fire, flood, hurricane, lightning, meteor, parallel, series, volcano }
Difference
$$A - B =$$
{ disease, earthquake, fire, flood, hurricane, lightning, meteor, volcano }
Difference
$$B - A =$$
{ parallel, series }
Cartesian Product
$$A \times B =$$
{ (disease, parallel),
(disease, series),
(earthquake, parallel),
(earthquake, series),
(fire, parallel),
(fire, series),
(flood, parallel),
(flood, series),
(hurricane, parallel),
(hurricane, series),
(lightning, parallel),
(lightning, series),
(meteor, parallel),
(meteor, series),
(volcano, parallel),
(volcano, series) }
Series and parallel circuits