Dear GAP forum,
I extend GF(2) by a primitive 19-th root of unity as follows: gap> xi:=PrimitiveRoot(GF(2^18))^((2^18-1)/19); z gap> F:=GF(GF(2),MinimalPolynomial(GF(2),xi)); <field of size 262144> However I am interested in the subfields of this field. But this causes an error in GAP: gap> Subfields(F); Error, no method found! For debugging hints type ?Recovery from NoMethodFound Error, no 2nd choice method found for `Subfields' on 1 arguments called from <function "HANDLE_METHOD_NOT_FOUND">( <arguments> ) called from read-eval loop at line 28 of *stdin* you can 'quit;' to quit to outer loop, or you can 'return;' to continue Is there a way to get around this error? Thanks Inneke Van Gelder _______________________________________________ Forum mailing list Forum@mail.gap-system.org http://mail.gap-system.org/mailman/listinfo/forum
