I was asked to install the optional package HAP to the GAP inside
SageMath.
I run ./sage -i gap_packages and then followed instructions at
https://wiki.sagemath.org/InstallingGapPackages . Now it works from
command line, i.e. I can say
gap_console()
and then
LoadPackage("HAP");
F:=FreeGroup(2);; x:=F.1;; y:=F.2;;
G:=F/[x^2,y^201,(x*y)^2];; G:=Image(IsomorphismPermGroup(G));;
GroupHomology(G,99);
and got
[ 2, 3, 67 ]
But from the SageNB I got
#I MakeReadOnlyGlobal: GradedAlgebraPresentationType no value bound
true
from LoadPackage() and nothing from GroupHomology(G,99).
What to do?
--
Jori Mäntysalo
