Dear all,
This is to announce the release of GAP 4.7.8, which could be downloaded from
http://www.gap-system.org/Releases/
This is the first GAP release made from the official development repository
for GAP on GitHub (https://github.com/gap-system/gap). It fixes several bugs
which could lead to incorrect results:
- Added two groups of degree 1575 which were missing in the library of
primitive groups. [Reported by Gordon Royle]
- Fixed the error in the code for algebra module elements in packed
representation caused by the use of Objectify with the type of the given
object instead of ObjByExtRep. The problem was that after calculating
u+v where one of the summands was known to be zero, this knowledge was
wrongly passed to the sum via the type. [Reported by Istvan Szollosi]
- Fixed a bug in PowerMod (Reference: PowerMod) causing wrong results for
univariate Laurent polynomials when the two polynomial arguments are stored
with the same non-zero shift. [Reported by Max Horn]
Furthermore, GAP 4.7.8 distribution includes two new GAP packages:
- PatternClass by Michael Albert, Ruth Hoffmann and Steve Linton, allowing
to explore the permutation pattern classes build by token passing networks.
Amongst other things, it can compute the basis of a permutation pattern
class, create automata from token passing networks and check if the
deterministic automaton is a possible representative of a token passing
network.
- QPA by Edward Green and Øyvind Solberg, providing data structures and
algorithms for computations with finite dimensional quotients of path
algebras, and with finitely generated modules over such algebras. It
implements data structures for quivers, quotients of path algebras,
and modules, homomorphisms and complexes of modules over quotients
of path algebras.
as well as updates of 17 other GAP packages:
Package name | Version | Date
--------------------------------------------------
4ti2Interface | 2015.04.29 | 29/04/2015
AutoDoc | 2015.04.29 | 29/04/2015
ExamplesForHomalg | 2013.07.06 | 06/07/2013
FR | 2.2.1 | 27/03/2015
gpd | 1.34 | 05/06/2015
homalg | 2015.03.31 | 31/03/2015
HomalgToCAS | 2015.03.20 | 20/03/2015
idrel | 2.31 | 01/06/2015
IntPic | 0.2.1 | 05/06/2015
IO_ForHomalg | 2015.03.16 | 16/03/2015
kan | 1.21 | 02/06/2015
Modules | 2015.03.19 | 19/03/2015
NumericalSgps | 1.0.1 | 05/06/2015
PolymakeInterface | 2015.01.26 | 26/01/2015
RingsForHomalg | 2015.02.11 | 11/02/2015
Semigroups | 2.5 | 01/06/2015
XMod | 2.41 | 05/06/2015
==================================================
We encourage all users to upgrade to GAP 4.7.8. If you need any
help or would like to report any problems, please do not hesitate
to contact us at supp...@gap-system.org or submit new issues on
GitHub at https://github.com/gap-system/gap/issues
Wishing you fun and success using GAP,
The GAP Group
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