CTAN update: prooftrees
All forest keylists are now left untouched to make user customisation easier and some additional keylists are reserved for user use. These are before copying content, before making annotations and before annotating. A couple of long nodewalk steps are either documented or added for easier navigation and a convenience style to facilitate drawing around nodewalks is provided. The package will now explicitly error if tagging is activated. (It is possible to avoid this if you are sufficiently determined and produce something which at least satisfies verapdf and provides useful alt text automatically, but this is unsupported.)
The package’s Catalogue entry can be viewed at https://ctan.org/pkg/prooftrees The package’s files themselves can be inspected at https://mirrors.ctan.org/graphics/pgf/contrib/prooftrees/
Thanks for the upload. For the CTAN Team Petra Rübe-Pugliese
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prooftrees – Forest-based proof trees (symbolic logic)
The package supports drawing proof trees of the kind often used in introductory logic classes, especially those aimed at students without strong mathematical 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, prooftree, 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 2.0.2 of Forest for expected results and will not work with version 1. Out-of-the-box support for memoization is based on forest version 2.1.
| Package | prooftrees |
| Version | 0.9.1 2025-09-04 |
| Copyright | 2016–2025 Clea F. Rees |
| Maintainer | Clea F. Rees |