This is some functions for PARI/GP doing interval arithmetic. The representation is simply a 2-element vector [lo,hi] but is convenient for simple calculations. is free software (free as in freedom), published under the terms of the GNU General Public License (v3 or higher). Download version 1 here, (13k, and sig)
interv-1.tar.gz (43k, and sig)

Just is enough to run. Comments at the start give an introduction and overview, then each function has an addhelp(). The tar file includes some example scripts, self-tests, and some work-in-progress extras. The extras mostly work but may change wildly. The sig files are Gnu PG ascii armoured signatures generated from my key.

This page Copyright 2022 Kevin Ryde, except for the GPLv3 logo which is Copyright Free Software Foundation and used here in accordance with its terms.

(Back to the sitemap, or the PARI/GP section there).