Special sets.

\(\emptyset\)

The empty set is the set which contains no elements.

\(\U\)

The universe set is the set of all elements.

\(\N\)

The set of natural numbers. That is, \(\N = \{0, 1, 2, 3\ldots\}\text{.}\)

\(\Z\)

The set of integers. That is, \(\Z = \{\ldots, -2, -1, 0, 1, 2, 3, \ldots\}\text{.}\)

\(\Q\)

The set of rational numbers.

\(\R\)

The set of real numbers.

\(\pow(A)\)

The power set of any set \(A\) is the set of all subsets of \(A\text{.}\)

in-context