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This is a page on GAP 3, which is still available, but no longer supported. The present version is GAP 4  (See  Status of GAP 3).

GAP 3 Share Package "nq"

Nilpotent Quotient algorithm for finitely presented groups

Share package since release 3.2, about January 1993.
Corresponding GAP 4 package: GAP 4 package "nq".


Werner Nickel.


Language: C
Operating system: Unix
Current version: (no version number given in the 3.4.4 distribution)


The NQ package computes the quotient groups of a finitely presented group F successively modulo the terms of the lower central series of F. If it terminates, it returns a list L. The i-th entry of L contains the non-trivial abelian invariants of the i-th factor of the lower central series of F (the largest abelian quotient being the first factor).


An NQ manual is given in chapter 56, section 10 of the GAP 3 manual.

Contact address

Werner Nickel
Fachbereich Mathematik
TU Darmstadt
Schlossgartenstr. 7
D-64289 Darmstadt