Faster class group computations using norm relations
Examples : multiquadratic fields
Degree 32 :
? pol = multiquad([-1,2,3,5,7]);
? abbnf = abelianbnfinit(pol);
cpu time = 3,185 ms.
? getcyc(abbnf)
% = [8, 4, 4, 2]
? bnf = bnfinit(pol);
cpu time = 8,271 ms.
? bnf.cyc
% = [8, 4, 4, 2]