91 reputation
2
bio website
location
age
visits member for 3 years, 11 months
seen Nov 20 '10 at 19:56

Jun
5
awarded  Nice Answer
Nov
20
comment Finite abelian groups as class groups
@Pete, I can't comment on your answer, but I think you meant to say that the order of the group $2 H_D$ goes to infinity. The order of $H_D/2 H_D$ (as you know) corresponds to the genus field, which has order $2^{d-1}$ where $d$ is the number of prime factors of the discriminant.
Nov
20
awarded  Teacher
Nov
19
answered Finite abelian groups as class groups