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### 1 Introduction

#### 1.1 Overview over this manual

Chapter 1 is concerned with the technical details of installing and running this package. The following chapter 2 explains how to use SCO to compute simplicial (co-)homology of orbifolds. For the theoretical parts please refer to my diploma thesis and the corresponding paper (work in progress; [Gör08a]). After this chapter you will find some simple examples on using SCO with (finite) groups, manifolds, or some easy orbifolds. Also included in this manual is a documented list of the most important methods and functions you will need to work with SCO's data types OrbifoldTriangulation and SimplicialSet and to create the matrices needed for computations. Anyone interested in source code should just check out the files in the gap/pkg/SCO/gap/ folder (--> Appendix A).

#### 1.2 Installation of the SCO Package

To install this package just extract the package's archive file to the GAP pkg/ directory. By default the SCO package is not automatically loaded by GAP when it is installed. You must load the package with LoadPackage("SCO"); before its functions become available. Please, send me an e-mail if you have any questions, remarks, suggestions, etc. concerning SCO. Also, I would like to hear about applications of this package.
Simon Goertzen

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