Ideal Class Groups and Subgroups of Real Quadratic Function Fields, by KunPeng WANG and XianKe
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.
KunPeng WANG and XianKe <email@example.com>