CTAN update: prooftrees
prooftrees now uses the updated forest-ext (v0.3) for tagging and memoize-ext for memoizing tagged tableaux (if memoize is loaded). Changes should not affect the user interface unless custom tagging was enabled, in which case some modifications may be required. (But in this case, almost everything is done by the user and not this package, so hopefully this should not be a problem.) This greatly simplifies the memos since most complications involving catcode changes can be avoided.
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 2.1+ of forest for expected results. It will not work with versions prior to 2.1.
| Package | prooftrees |
| Version | 0.9.3 2026-02-21 |
| Copyright | 2016–2026 Clea F. Rees |
| Maintainer | Clea F. Rees |