---
syntax: markdown
tags: [tldr, common]
source: https://github.com/tldr-pages/tldr.git
---
# eqn

> Equation preprocessor for the groff (GNU Troff) document formatting system.
> See also `troff` and `groff`.
> More information: <https://manned.org/eqn>.

- Process input with equations, saving the output for future typesetting with groff to PostScript:

`eqn {{path/to/input.eqn}} > {{path/to/output.roff}}`

- Typeset an input file with equations to PDF using the [me] macro package:

`eqn -T {{pdf}} {{path/to/input.eqn}} | groff -{{me}} -T {{pdf}} > {{path/to/output.pdf}}`
