# Category:Even Functions

This category contains results about Even Functions.

Let $X \subset \R$ be a symmetric set of real numbers:

$\forall x \in X: -x \in X$

A real function $f: X \to \R$ is an even function if and only if:

$\forall x \in X: \map f {-x} = \map f x$

## Subcategories

This category has only the following subcategory.

## Pages in category "Even Functions"

The following 10 pages are in this category, out of 10 total.