Definition:Class (Class Theory)

Definition
A class is a collection of all sets such that a particular condition holds.

In class builder notation, this is written as:


 * $\left\{{x : p \left({x}\right)}\right\}$

where $p \left({x}\right)$ is a statement containing $x$ as a free variable.

This is read:
 * All $x$ such that $p \left({x}\right)$ holds.

Also see

 * Small Class