1<?xml version="1.0" encoding="UTF-8"?> 2 3<Chapter> 4<Heading>Introduction</Heading> 5 6This package provides an interface between &GAP; 4 and the 7Australian National University Nilpotent Quotient Program (ANU NQ). 8The ANU NQ was implemented as part of the author's work towards his 9PhD at the Australian National University, hence the name of the 10program. The program takes as input a finite presentation of a 11group and successively computes factor groups modulo the terms of 12the lower central series of the group. These factor groups are 13computed in terms of polycyclic presentations. 14 15<P/> The ANU NQ is implemented in the programming language C. The 16implementation has been developed in a Unix environment and Unix is 17currently the only operating system supported. It runs on a number 18of different Unix versions, e.g. Solaris and Linux. 19 20<P/> For integer matrix computations it relies on the GNU MP <Cite 21Key="GNUMP"/> package and requires this package to be installed on 22your system. 23 24<P/> This package relies on the functionality for polycyclic groups 25provided by the &GAP; package <Package>polycyclic</Package> <Cite 26Key="polycyclic"/> and requires the package 27<Package>polycyclic</Package> to be installed as a &GAP; package on 28your computer system. 29 30<P/> 31Comments, bug reports and suggestions are very welcome, please 32submit them via our 33<URL Text="issue tracker">https://github.com/gap-system/nq/issues</URL>. 34 35<P/> This manual contains references to parts of the &GAP; Reference 36Manual which are typeset in a slightly idiosyncratic way. The 37following example shows how such references are printed: 'For 38further information on creating a free group see <Ref BookName="ref" 39Func="FreeGroup"/>.' The text in bold face refers to the &GAP; 40Reference Manual. 41 42<P/>Each item in the list of references at the end of this manual is 43followed by a list of numbers that specify the pages of the manual 44where the reference occurs. 45 46</Chapter> 47