## About

The equivalence relation is a relationship between two entities.

The equivalence relation is also known as:

- is equal to.
- equality
- is parallel to (for affine spaces)
- is in bijection with - bijection
- isomorphy

## Properties

An equivalence relation is a binary relation that is:

## Computer language

- In a language grammar, the equality relationship is tested with the equal operator.
- To be able to sort a set, the equivalence is tested.