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Quelle README.md
Sprache: unbekannt
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[](https://github.com/gap-packages/lpres/actions?query=workflow%3ACI+branch%3Amaster)
[](https://codecov.io/gh/gap-packages/lpres)
# The GAP 4 package `lpres`
## Introduction
This is the package `lpres` written for GAP 4. It provides a first
construction of finitely L-presented groups and a nilpotent quotient
algorithm for L-presented groups.
The features of this package include
- creating an L-presented group as new gap object,
- computing nilpotent quotients of L-presented groups and epimorphisms
from the L-presented group onto its nilpotent quotients,
- computing the abelian invariants of an L-presented group,
- computing finite-index subgroups and if possible their L-presentation
- approximating the Schur multiplier of L-presented groups.
There is a manual in the subdirectory `doc` written in plain TeX which
describes the functions available.
If you have found a bug or any features missing please let me know
(Laurent Bartholdi, laurent.bartholdi@gmail.com)
## Contents
With this version you should have obtained the following files and
directories:
README.lpres this file
init.g the file that initializes this package
read.g the file that reads in the package
makedoc.g the file used to compile the documentation
PackageInfo.g the file for the new package loading mechanism
doc the manual
gap the GAP code
## Installation
Make sure that the GAP 4 packages Polycyclic and FGA are installed. It
suffices to unpack the package in the `pkg` directory and load the
package from within gap using `LoadPackage("lpres");`.
## Test Files
The lpres package can be tested with
ReadPackage("lpres","tst/testall.g");
## Compiling the Manual
If you obtained the package from its git repository, you have to compile
the manual. For this, enter the directory of lpres (the one containing
the file `makedoc.g`) and run `gap makedoc.g`.
## BugFixes/Changes/Features Added
* Version 0.1.0:
- maintenance taken over by Laurent Bartholdi
[ Dauer der Verarbeitung: 0.22 Sekunden
(vorverarbeitet)
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2026-03-28
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