Dear GAP Forum, I am pleased to announce that the new version 4.7 of GRAPE is included in the recently released GAP 4.8.2. All users and installers of GRAPE should read this email in its entirety.
The main new feature of GRAPE 4.7 is that the user may run their own separately installed copy of bliss or nauty or nauty/traces rather than using the included version of nauty 2.2 included in GRAPE 4.7. How to do this is described in Chapter 1 of the GRAPE 4.7 manual. Please note that the nauty interface for GRAPE 4.7 has only been extensively tested with the included version 2.2 of nauty, and the bliss interface has only been tested with version 0.73 of bliss. The interface to bliss was originally written by Jerry James (who I thank), who modified and packaged GRAPE 4.6.1 as a Fedora package (in Fedora 22, 23 and 24) to use bliss instead of nauty, due to Fedora licensing rules. Unfortunately, there were some bugs in this initial interface, which could cause wrong results to be returned. This interface was fixed for inclusion in GRAPE 4.7 and I am pleased to see that now there are Fedora package versions of GRAPE 4.7 for Fedora 23 and 24, but I have not tried them and would appreciate any feedback you have on those Fedora package versions. However, please note that I can only guarantee support for official versions of GRAPE obtained either from http://www.maths.qmul.ac.uk/~leonard/grape/ or as part of the official GAP distribution downloaded from http://www.gap-system.org The user should test any installation of GRAPE 4.7 (and its interface to bliss or nauty or nauty/traces) using the new GRAPE testfile. In GAP, the command Test(Filename(DirectoriesPackageLibrary("grape","tst"),"testall.tst")); should return the value true. I wish you happy computing with GRAPE 4.7! Regards, Leonard _______________________________________________ Forum mailing list Forum@mail.gap-system.org http://mail.gap-system.org/mailman/listinfo/forum
