Dear Alexander and Bettina, Thank you very much.
Best regards, Victor Bovdi > Dear GAP-forum, Dear Victor Bovdi, > >> Let A and B be finite 2-groups. >> I am interested in the isomorphism classes of the semidirect (or/and >> central) products of these groups. >> >> Do you know about a package which can aid this sort of calculation ? > > There is no function that does these calculations directly -- you would > have to go step-by-step in determining > > - Calculate Aut(N) (the package autpgrp will help) > - Classify all homomorphisms from G to Aut(N) (there will be a function > `AllHomomorphismClasses' in GAP4 and i can send you code for this > privately if you are interested). > - Form the semidirect products using `SemidirectProduct' > - Test for isomorphism (the `anupq' package can help here, as the > extensions are p-groups) > > Best wishes, > > Alexander Hulpke (with help from Bettina Eick) > > -- Colorado State University, Department of Mathematics, > Weber Building, 1874 Campus Delivery, Fort Collins, CO 80523-1874, USA > email: hul...@math.colostate.edu, Phone: ++1-970-4914288 > http://www.math.colostate.edu/~hulpke > > > > _______________________________________________ Forum mailing list Forum@mail.gap-system.org http://mail.gap-system.org/mailman/listinfo/forum
