[GAP Forum] GAP 4.7.6 release announcement

[Alexander Konovalov]

Dear GAP Forum,


This is to announce the release of GAP 4.7.6, which could be downloaded from

   http://www.gap-system.org/Releases/


One of the new features is that Windows users may now use the standard installer 

   http://www.gap-system.org/pub/gap/gap47/exe/gap4r7p6_2014_11_15-20_02.exe

which became an official format for the GAP distribution for Windows.

Alternative installers for Linux and OS X (BOB and GAP Rsync) will be 
updated later in due course.

The overview of changes in GAP 4.7.6 versus GAP 4.7.5 is given below.


Fixed bugs which could lead to incorrect results:

* A bug that may cause ShortestVectors to return an incomplete list. 
 [Reported by Florian Beye]

* A bug that may lead to incorrect results and infinite loops when 
 GAP is compiled without GMP support using gcc 4.9.

* A bug that may cause OrthogonalEmbeddings to return an incomplete 
 result. [Reported by Benjamin Sambale]


Fixed bugs that could lead to break loops:

* ClosureGroup should be used instead of in case there is no parent 
 group, otherwise some calculations such as e.g. NormalSubgroups may 
 fail. [Reported by Dmitrii Pasechnik]

* Fixed a line in the code that used a hard-coded identity permutation, 
 not a generic identity element of a group. [Reported by Toshio Sumi]

* Fixed a problem in the new code for calculating maximal subgroups that 
 caused a break loop for some groups from the transitive groups library. 
 [Reported by Petr Savicky]

* Fixed a problem in ClosureSubgroup not accepting some groups without 
 Parent. [Reported by Inneke van Gelder]


Other fixed bugs:

* Eliminated a number of compiler warnings detected with some newer 
 versions of C compilers.

* Some minor bugs in the transformation and partial permutation code 
 and documentation were resolved.


In addition to the improved functionality and fixed bugs in the 
core GAP system, GAP 4.7.6 includes 25 updates of GAP packages:

Package name          | Version     | Date
------------------------------------------------
AutoDoc               | 2014.08.21  | 21/08/2014
Browse                | 1.8.6       | 15/08/2014
Congruence            | 1.1.1       | 28/10/2014
cvec                  | 2.5.3       | 08/11/2014
Example               | 3.4.5       | 28/10/2014 
Float                 | 0.6.2       | 29/08/2014
genss                 | 1.6.2       | 24/09/2014 
GradedModules         | 2014.09.17  | 17/09/2014 
GradedRingForHomalg   | 2014.08.27  | 27/08/2014
homalg                | 2014.09.14  | 14/09/2014
IO                    | 4.4.4       | 10/11/2014 
LAGUNA                | 3.7.0       | 11/11/2014 
LiePRing              | 1.6         | 08/11/2013
LocalizeRingForHomalg | 2014.08.27  | 27/08/2014
MatricesForHomalg     | 2014.08.26  | 26/08/2014
ModIsom               | 2.3.2       | 04/07/2014 
Modules               | 2014.07.02  | 02/07/2014 
orb                   | 4.7.3       | 08/11/2014
RCWA                  | 3.7.0       | 21/07/2014
recog                 | 1.2.3       | 24/09/2014
recogbase             | 1.2.3       | 24/09/2014
ResClasses            | 3.4.0       | 21/07/2014 
Semigroups            | 2.1.1       | 09/09/2014
UnitLib               | 3.2.0       | 11/11/2014
Wedderga              | 4.7.1       | 07/11/2014
================================================


We encourage all users to upgrade to GAP 4.7.6. 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.


Wishing you fun and success using GAP,

The GAP Group


P.S. You may also find some GAP related news on Twitter: http://twitter.com/gap_system