# CTAN Update: polexpr

Date: January 19, 2018 7:22:17 PM CET

Jean-François Burnol submitted an update to the
polexpr
package.
Version: 0.3.1 2018-01-18
License: lppl1.3c
Summary description: A parser for polynomial expressions
Announcement text:

There are two main changes: - polynomials are also made known as functions to the \xintfloatexpr parser. This is indispensible for numerical algorithms (such as finding roots by Newton's method or Regula Falsi) as exact computations quickly give very big fractions. - there was a breaking change for \PolToExpr. It now outputs in descending powers; use \PolToExpr* for ascending powers. See README.md for more. The documentation (in polexpr.html) was extended and fully revised.

The package’s Catalogue entry can be viewed at https://ctan.org/pkg/polexpr (although, at the moment, the data displayed on this page are not up to date due to a bug of the website. Sorry for the inconvenience!)) 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

We are supported by the TeX users groups. Please join a users group; see https://www.tug.org/usergroups.html .

There are two main changes: - polynomials are also made known as functions to the \xintfloatexpr parser. This is indispensible for numerical algorithms (such as finding roots by Newton's method or Regula Falsi) as exact computations quickly give very big fractions. - there was a breaking change for \PolToExpr. It now outputs in descending powers; use \PolToExpr* for ascending powers. See README.md for more. The documentation (in polexpr.html) was extended and fully revised.

The package’s Catalogue entry can be viewed at https://ctan.org/pkg/polexpr (although, at the moment, the data displayed on this page are not up to date due to a bug of the website. Sorry for the inconvenience!)) 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

We are supported by the TeX users groups. Please join a users group; see https://www.tug.org/usergroups.html .

## polexpr – A parser for polynomial expressions

The package provides `\poldef`: a parser for polynomial
expressions based upon the `\xintdeffunc` mechanism of
the package xintexpr.

The parsed expressions use the operations of algebra (inclusive of
composition of functions) with standard operators, fractional numbers
(possibly in scientific notation) and previously defined polynomial
functions or other constructs as recognized by the `\xintexpr`
numerical parser.

The polynomials are then not only genuine `\xintexpr` numerical
functions but additionally are also known to the package via their
coefficients. This allows dedicated macros to implement polynomial
algorithmics.

Package | polexpr |

Version | 0.7.5 2020-01-31 |

Copyright | 2018–2020 Jean-François Burnol |

Maintainer | Jean-François Burnol |