# Logical Data Modeling - Equivalence Relationship (Equality)

### Table of Contents

## 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

## Articles Related

## Properties

An equivalence relation is a binary relation that is: