The package allows the construction of proof trees in the style of the sequent calculus and many other proof systems. One novel feature of the macros is they support the horizontal alignment according to some centre point specified with the command \fCenter. This is the style often used in sequent calculus proofs. The package works in a Plain TeX document, as well as in LaTeX; an exposition of the commands available is given in the package file itself.
Binary packages can be installed with the high-level tool pkgin (which can be installed with pkg_add) or pkg_add(1) (installed by default). The NetBSD packages collection is also designed to permit easy installation from source.
The pkg_admin audit command locates any installed package which has been mentioned in security advisories as having vulnerabilities.
Please note the vulnerabilities database might not be fully accurate, and not every bug is exploitable with every configuration.
Problem reports, updates or suggestions for this package should be reported with send-pr.