On 2013-04-02 21:13, Victor Miller wrote: > I have a bunch of ideals in number fields whose orders in the class > group I want to calculate. If K is the number field and a is the ideal, > I had been doing something like > > H = K.class_group() > print H(a).order() > > But if K is a big number field this seems wasteful (and takes a long > time), since it computes the whole class group. As far as I know, there is no way to do this without computing the class group.
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