Dear Forum, it works for me (on OSX 10.6.8): ********* GAP, Version 4.6.4 of 04-May-2013 (free software, GPL) * GAP * http://www.gap-system.org ********* Architecture: x86_64-apple-darwin10.8.0-gcc-default64 Libs used: gmp, readline Loading the library and packages ... Packages: Alnuth 3.0.0, AutPGrp 1.5, CTblLib 1.2.2, FactInt 1.5.3, GAPDoc 1.5.1, LAGUNA 3.6.3, Polycyclic 2.11 Try '?help' for help. See also '?copyright' and '?authors' gap> S:=PSp(4,8); <permutation group of size 1056706560 with 2 generators> gap> OrbitLength(S,1); 585 gap> NormalSubgroups(S); [ Group(()), <permutation group of size 1056706560 with 2 generators> ] gap> A:=AutomorphismGroup(S); <group with 8 generators> gap> Order(A)/Order(S); 6 gap> Size(A)/Size(S); 6
What version of GAP are you using, and on which OS/hardware? On Tue, Feb 11, 2014 at 01:08:22PM +0700, Anvita wrote: > Dear Forum, > > According to the ATLAS, the simple group S4(8) has outer automorphism group > of order 6, > but the following calculation, if I am interpreting it correctly, seems to > suggest that it has order 3. > > Anvita > > > gap> S:=PSp(4,8); > <permutation group of size 1056706560 with 2 generators> > gap> A:=AutomorphismGroup(S); > <group with 4 generators> > gap> Size(A)/Size(S); > 3 > _______________________________________________ _______________________________________________ Forum mailing list Forum@mail.gap-system.org http://mail.gap-system.org/mailman/listinfo/forum
