CTAN Update: polexpr
There were some bug fixes, and one main new feature: localization of real roots via the Sturm chain theorem and dichotomy. There are also a few breaking changes, please refer to the html documentation for complete details. It has been enriched with a number of examples related to root localization.
The package’s Catalogue entry can be viewed at https://ctan.org/pkg/polexpr The package’s files themselves can be inspected at http://mirror.ctan.org/macros/latex/contrib/polexpr/
Thanks for the upload. For the CTAN Team Petra Rübe-Pugliese
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polexpr – A parser for polynomial expressions
The package provides a parser \poldef of algebraic polynomial expressions. As it is based on xintexpr, the coefficients are allowed to be arbitrary rational numbers.
Once defined, a polynomial is usable by its name either as a numerical function in \xintexpr/\xinteval, or for additional polynomial definitions, or as argument to the package macros. The localization of real roots to arbitrary precision as well as the determination of all rational roots is implemented via such macros.
Since release 0.8, polexpr extends the xintexpr syntax to recognize polynomials as a new variable type (and not only as functions). Functionality which previously was implemented via macros such as the computation of a greatest common divisor is now available directly in \xintexpr, \xinteval or \poldef via infix or functional syntax.
| Package | polexpr |
| Version | 0.8.7a 2022-05-19 |
| Copyright | 2018–2022 Jean-François Burnol |
| Maintainer | Jean-François Burnol |