Fedora 22 Update: gap-pkg-aclib-1.2-2.fc22

[updates at fedoraproject.org]

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Fedora Update Notification
FEDORA-2015-12138
2015-07-29 21:38:21
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Name        : gap-pkg-aclib
Product     : Fedora 22
Version     : 1.2
Release     : 2.fc22
URL         : http://www.icm.tu-bs.de/~beick/so.html
Summary     : Almost Crystallographic groups library for GAP
Description :
The AClib package contains a library of almost crystallographic groups
and some algorithms to compute with these groups.  A group is called
almost crystallographic if it is finitely generated nilpotent-by-finite
and has no nontrivial finite normal subgroups.  Further, an almost
crystallographic group is called almost Bieberbach if it is
torsion-free.  The almost crystallographic groups of Hirsch length 3 and
a part of the almost cyrstallographic groups of Hirsch length 4 have
been classified by Dekimpe.  This classification includes all almost
Bieberbach groups of Hirsch lengths 3 or 4.  The AClib package gives
access to this classification; that is, the package contains this
library of groups in a computationally useful form.  The groups in this
library are available in two different representations.  First, each of
the groups of Hirsch length 3 or 4 has a rational matrix representation
of dimension 4 or 5, respectively, and such representations are
available in this package.  Secondly, all the groups in this library
are (infinite) polycyclic groups and the package also incorporates
polycyclic presentations for them.  The polycyclic presentations can be
used to compute with the given groups using the methods of the
Polycyclic package.

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Update Information:

This new package contains a library of almost crystallographic groups and some algorithms to compute with these groups.  A group is called almost crystallographic if it is finitely generated nilpotent-by-finite and has no nontrivial finite normal subgroups.  Further, an almost crystallographic group is called almost Bieberbach if it is torsion-free.  The almost crystallographic groups of Hirsch length 3 and a part of the almost cyrstallographic groups of Hirsch length 4 have been classified by Dekimpe.  This classification includes all almost Bieberbach groups of Hirsch lengths 3 or 4.  The AClib package gives access to this classification; that is, the package contains this library of groups in a computationally useful form.  The groups in this library are available in two different representations.  First, each of the groups of Hirsch length 3 or 4 has a rational matrix representation of dimension 4 or 5, respectively, and such representations are available in this package.  Secondly, all the groups in this library are (infinite) polycyclic groups and the package also incorporates polycyclic presentations for them.  The polycyclic presentations can be used to compute with the given groups using the methods of the Polycyclic package.
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References:

  [ 1 ] Bug #1233989 - Review Request: gap-pkg-aclib - Almost Crystallographic groups library for GAP
        https://bugzilla.redhat.com/show_bug.cgi?id=1233989
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This update can be installed with the "yum" update program.  Use
su -c 'yum update gap-pkg-aclib' at the command line.
For more information, refer to "Managing Software with yum",
available at http://docs.fedoraproject.org/yum/.

All packages are signed with the Fedora Project GPG key.  More details on the
GPG keys used by the Fedora Project can be found at
https://fedoraproject.org/keys
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