2 Installation of the LocalizeRingForHomalg Package To install this package just extract the package's archive file to the GAP pkg directory. LocalizeRingForHomalg also needs the package homalg. By default the LocalizeRingForHomalg package is not automatically loaded by GAP when it is installed. You must load the package with LoadPackage("LocalizeRingForHomalg"); before its functions become available. Please, send me us e-mail if you have any questions, remarks, suggestions, etc. concerning this package. Also, we would be pleased to hear about applications of this package. Mohamed Barakat and Markus Lange-Hegermann