1 Introduction

The GAP 4 package RiG provides a library of functions for computations related to racks. This package can also be used to make basic calculations of cohomology of finite racks.

In chapter 2 we give a short summary of parts of the theory of finite racks and Nichols algebras. This fixes the notations and definitions that we use. In chapter 3 we describe the functions that constitute the package.

To load the package, type:

gap> LoadPackage("rig");
--
RiG, A GAP package for racks, Version 0.9
http://code.google.com/p/rig/
true

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