$Id: README.md 11666 2026-02-21 01:53:54Z cfrees $

prooftrees

A LaTeX package for drawing logical tableaux.

Licence

Copyright 2016-2026 Clea F. Rees

This work may be distributed and/or modified under the conditions of the LaTeX Project Public License, either version 1.3c of this license or (at your option) any later version. The latest version of this license is in https://www.latex-project.org/lppl.txt and version 1.3c or later is part of all distributions of LaTeX version 2008-05-04 or later.

This work has the LPPL maintenance status maintained'. The Current Maintainer of this work is Clea F. Rees.

This file may only be distributed together with a copy of the package prooftrees. You may however distribute the package prooftrees without such generated files.

This work consists of all files listed in manifest.txt.

Features

This package supports drawing tableaux (proof trees) of the kind often used in introductory logic classes, especially those aimed at students without strong mathemtical backgrounds. Hodges (1991) is one example of a text which uses this system. When teaching such a system it is especially useful to annotate the tree with line numbers, justifications and explanations of branch closures.

prooftrees provides a single environment - either prooftree or tableau - and a variety of tools for annotating, customising and highlighting such trees. A cross-referencing system is provided for trees which cite line numbers in justifications for proof lines or branch closures.

prooftrees is based on Forest and, hence, TikZ. The package requires version 2.1+ of Forest for expected results and will not work with version 1.

Version 0.9 adds out-of-the-box support for externalisation of tableaux using memoize.

Version 0.9.2 supported tagging with forest-ext.

Version 0.9.3 uses an updated forest-ext to support tagging tableaux memoized with Memoize using sockets provided by memoize-ext. This means that forest-ext is required and that memoize-ext is required if memoize is loaded.

Code Repositories

Code for the package is hosted at

https://codeberg.org/cfr/prooftrees

For convenience, the repository is mirrored at https://github.com/cfr42/prooftrees

Contact Details

Bug reports, feature requests etc. should be filed at https://codeberg.org/cfr/prooftrees/issues

Clea F. Rees Version 0.9.3 2026-02-21

vim: et:tw=80: