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# 3 Installation

### Sections

1. Getting and Installing this Package
2. Loading the Package
3. Additional Requirements

## 3.1 Getting and Installing this Package

This package is available at

    http://www.icm.tu-bs.de/ag_algebra/software/distler/radiroot

in form of a gzipped tar-archive. For the installation instructions see Chapter Installing a GAP Package in the GAP Reference Manual. Normally you will unpack the archive in the 'pkg' directory of your GAP-Version by typing:

        bash> tar xfz radiroot.tar.gz        # for the gzipped tar-archive

## 3.2 Loading the Package

To use the Radiroot Package you have to request it explicitly. This is done by calling

    gap> LoadPackage("radiroot");
    -----------------------------------------------------------------------------
    Loading  RadiRoot 1.0 (Roots of a Polynomial as Radicals)
    by Andreas Distler (a.distler@tu-bs.de).
    -----------------------------------------------------------------------------
    true

The `LoadPackage` command is described in Section LoadPackage in the GAP Reference Manual.

If you want to load the Radiroot package by default, you can put the `LoadPackage` command into your `.gaprc` file (see Section The .gaprc file in the GAP Reference Manual).

## 3.3 Additional Requirements

The package Alnuth 2.0 or higher has to be available with its full functionality to use Radiroot.

A dvi file is created to display roots. As default the package uses the command `latex` searched for in your system programs to create the dvi file and the command `xdvi` to start the dvi viewer. If you can't use this settings you will have to change the function `RR_Display` in the file `Strings.gi` in the subdirectory `lib`.

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