Dear GAP Forum, This is to announce the release of GAP 4.8.5, which could be downloaded from
http://www.gap-system.org/Releases/ An overview of the changes introduced in GAP 4.8.5 is provided below. A more detailed version with hyperlinks to documentation is available here: http://www.gap-system.org/Manuals/doc/changes/chap2.html#X84E1F4618181F6A3 Improved and extended functionality: * The error messages produced when an unexpected fail is returned were made more clear by explicitly telling that the result should not be boolean or fail (before it only said "not a boolean"). * For consistency, both NrTransitiveGroups and TransitiveGroup now disallow the transitive group of degree 1. Fixed bugs that could lead to incorrect results: * A bug in the code for algebraic field extensions over non-prime fields that may cause, for example, a list of all elements of the extension not being a duplicate-free. [Reported by Huta Gana] * So far, FileString only wrote files of sizes less than 2G and did not indicate an error in case of larger strings. Now strings of any length can be written, and in the case of a failure the corresponding system error is shown. Fixed bugs that could lead to break loops: * NaturalHomomorphismByIdeal was not reducing monomials before forming a quotient ring, causing a break loop on some inputs. [Reported by Dmytro Savchuk] * A bug in DefaultInfoHandler a break loop on startup with the setting SetUserPreference( "InfoPackageLoadingLevel", 4 ). [Reported by Mathieu Dutour] * The Iterator for permutation groups was broken when the StabChainMutable of the group was not reduced, which can reasonably happen as the result of various algorithms. In addition, GAP 4.8.5 distribution includes updates for 5 GAP packages, namely Cubefree, Digraphs, float, loops and SglPPow. We encourage all users to upgrade to GAP 4.8.5. Just in case, a common pitfall during GAP installation on Linux and OS X is to compile only the GAP kernel, but not GAP packages. This procedure had changed recently (in GAP 4.8.4) so just in case let me remind you that after running ./configure make in the GAP root directory you need to change to the 'pkg' subdirectory and call ../bin/BuildPackages.sh to run the script which will build most of the packages that require compilation (provided sufficiently many libraries, headers and tools are available). 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: https://github.com/gap-system/gap/issues Wishing you fun and success using GAP, The GAP Group _______________________________________________ Forum mailing list Forum@mail.gap-system.org http://mail.gap-system.org/mailman/listinfo/forum
