Imaginary quadratic number fields with class groups of small exponent

Andreas-Stephan Elsenhans, Jürgen Klüners, Florin Nicolae

Let $D<0$ be a fundamental discriminant and denote by $E(D)$ the exponent of the ideal class group $\text{Cl}(D)$ of $K=\mathbb{Q}(\sqrt{D})$. Under the assumption that no Siegel…