Some new GP features
rnfconductor
The reverse function rnfconductor now has a flag 1 to
compute only the n-torsion quotient of the bnr where n is the
degree of the abelian extension.
? \\ R = rnfconductor(bnf,F[1]); \\very slow
? R = rnfconductor(bnf,F[1],1); \\fast
? [cnd,bnr2,subg] = R; cnd
%30 = [[18446744073709551629,0
% ;0,18446744073709551629],[]]
? bnr2.cyc
%31 = [3]