#
nLab

fork

### Context

#### Category theory

**category theory**

## Concepts

## Universal constructions

## Theorems

## Extensions

## Applications

# Contents

## Idea

A **fork** is a diagram of the form

$A\underset{\quad e \quad}{\to}B\underoverset{\quad g \quad}{f}{\rightrightarrows}C$

such that $f e=g e$. An example of a special type of a fork is an equalizer. Another example is a *reflexive fork*, where $C = A$ and $f e = 1_A$.

A dual notion is also called a fork, but some people distinguish forks and coforks.

Last revised on January 11, 2016 at 09:40:16.
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