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Another look at real quadratic fields of relative class number 1
The relative class number $H_{d}(f)$ of a real quadratic field $K=\mathbb {Q}(\sqrt {m})$ of discriminant $d$ is defined to be the ratio of the class numbers of $\mathcal {O}_{f}$ and $\mathcal {O}_{K}$, where $\mathcal {O}_{K}$ denotes the ring of intege