Category:Empty Class

This category contains results about the empty class.

A class is defined as being empty if and only if it has no elements.

That is:

$\forall x: x \notin A$

or:

$\neg \exists x: x \in A$

The empty class is usually denoted $\O$ or $\emptyset$.

Pages in category "Empty Class"

The following 5 pages are in this category, out of 5 total.