Run Atlas

This page explains how to start running Atlas after you have completed Download and Install. There is also a video covering some of the same material.

Get Atlas Running

Navigate into the atlasofliegroups directory where you compiled the software. It should contain the executable file atlas. To verify:

file atlas

You should see something like:

atlas: ELF 64-bit LSB shared object, x86-64, version 1 (GNU/Linux), dynamically linked,
interpreter /lib64/ld-linux-x86-64.so.2, BuildID[sha1]=db51b2603a2949cfa75646963f81c18343dfb993,
for GNU/Linux 3.2.0, not stripped

The minimal way to test that Atlas has been installed correctly is:

./atlas

(depending on your environment the ./ might not be necessary).

You should see something like:

This is 'atlas' (version 1.1, axis language version 1.0),
the Atlas of Lie Groups and Representations interpreter,
compiled on Dec 30 2021 at 16:01:25.   http://www.liegroups.org/
atlas> 

If you used make install you can simply type atlas from anywhere and it will start up and automatically load the scripts.

Load Scripts

The Atlas software relies on a large library of script files in the atlas-scripts/ directory. To load all of them at once:

atlas> \a atlas-scripts/all.at

Or if you used make install, this happens automatically when you start Atlas. You can also load individual script files:

atlas> \a basic.at

To see which files are loaded, or to check that a particular function is available, use:

atlas> whattype function_name

Quit Atlas

To exit Atlas type q and press Enter, or press Ctrl-D:

atlas> q