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Name: gap-help | Distribution: openSUSE Tumbleweed |
Version: 4.0 | Vendor: openSUSE |
Release: 1.3 | Build date: Mon Mar 4 09:42:01 2024 |
Group: Productivity/Scientific/Math | Build host: reproducible |
Size: 1538748 | Source RPM: gap-help-4.0-1.3.src.rpm |
Packager: http://bugs.opensuse.org | |
Url: https://gap-packages.github.io/HeLP/ | |
Summary: GAP: Hertweck-Luthar-Passi method |
HeLP is a package to compute constraints on partial augmentations of torsion units in integral group rings using a method developed by Luthar, Passi and Hertweck. The package can be employed to verify the Zassenhaus Conjecture and the Prime Graph Question for finite groups, once characters are known. It uses an interface to the software package 4ti2 to solve integral linear inequalities.
GPL-2.0-only
* Mon Mar 04 2024 Jan Engelhardt <jengelh@inai.de> - Update to release 4.0 * Two new global functions: HeLP_SP and HeLP_KP to study the Spectrum Problem and the Kimmerle Problem and their companion functions HeLP_AllOrdersSP and HeLP_AllOrdersKP * More theoretical results are taken into account when the system to solve is generated, namely more partial augmentations are assumed to be 0 a priori. This includes three results: Berman-Higman (in the general form that the coefficient at a central element is 0, if the unit is not that element), Hertweck's Proposition 2 from [Hertweck08] (if a unit u has smaller order modulo a normal p-subgroup, elements with non-zero partial augmentations must have same p-power order as u) and Hertweck's p-adic criterion (units which map tp 1 modulo a normal p-subgroup are p-adically conjugate to elements in G and hence the p-part of any element with non-zero partial augmentation is unique up to conjugacy in G) * Three new minor global functions: HeLP_UnitSatisfiesKP to check manually for KP and given partial augmentaion; HeLP_IsOneModuloN to see if a unit is mapped to the identity modulo a normal subgroup N; HeLP_ForgetUnderlyingGroup to obtain same table without group structure. This way the new theretical restictions do not apply and one can obtain the results as in older versions * Wed Dec 21 2022 Jan Engelhardt <jengelh@inai.de> - Update to release 3.5 * Janitorial changes only * Sun Dec 24 2017 jengelh@inai.de - Update to new upstream release 3.3 * Line 542 in "expamples/examples.g" corrected * testfile in PackageInfo.g changed to "tst/testall.g" * Sat Apr 29 2017 jengelh@inai.de - Update to new upstream release 3.1 * New function HeLP_AutomorphismOrbits, HeLP_IsZCKnown, HeLP_WithGivenOrderAllTables, HeLP_WithGivenOrderAndPAAllTables, HeLP_WriteTrivialSolution. * Sun Jun 19 2016 jengelh@inai.de - Update to new upstream release 3.0 * Normaliz is included as a possible solver. * Functions included to switch between the solvers. For normaliz, a function is included to influence whether normaliz computes vertices of polyhedra. * Fri Mar 11 2016 jengelh@inai.de - Initial package (version 2.2) for build.opensuse.org
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Fabrice Bellet, Sun Jan 12 02:41:53 2025