[GAP Forum] lpres package acceptance

Alexander Konovalov alexander.konovalov at st-andrews.ac.uk
Mon Jan 7 21:58:58 GMT 2019


Dear GAP Forum,

It is a pleasure to announce the official acceptance of the GAP
package lpres developed by René Hartung and maintained by
Laurent Bartholdi.

The lpres package defines new GAP objects to work with L-presented
groups, namely groups given by a finite generating set and a
possibly-infinite set of relations given as iterates of finitely
many seed relations by a finite set of endomorphisms. The package
implements nilpotent quotient, Todd-Coxeter and Reidemeister-Schreier
algorithms for L-presented groups.

The lpres package has been already redistributed with GAP since its
version 0.4.1 included in GAP 4.8.7 distribution (March 2017). The
version that has been accepted is lpres 1.0.0, included in GAP 4.10.0
distribution (November 2018). The lpres package is the successor of
the GAP package NQL by René Hartung that has been accepted and
redistributed with GAP 4.4 and has been withdrawn since GAP 4.5. We
are grateful to René Hartung and Laurent Bartholdi for these
contributions, and very pleased to see that the revised functionality
from the NQL package is now available again to the users of the
latest GAP release.

For further information about the package, see its website at
https://gap-packages.github.io/lpres/. The source code is hosted
on GitHub at https://github.com/gap-packages/lpres. For suggestions,
feature requests and bug reports, please use the issue tracker at
https://github.com/gap-packages/lpres/issues.

Best regards
Alexander



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