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Ideal class groups and subgroups of real quadratic function fields

KunPeng Wang, Xianke Zhang

math.NTarXiv:math/0004191

Abstract

Here we study algebraic function fields K, give necessary and sufficient condition for the ideal class group H(K) of any real quadratic function field K to have a cyclic subgroup of order n, and obtain eight series of such fields K, with four of them NOT ERD-type or GERD-type.

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