[GAP Forum] GAP 4.7.8 release announcement

[Alexander Konovalov]

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 support at 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