On the flat cohomology of binary norm forms

Rony A. Bitan, Michael M. Schein

Let $\mathcal{O}$ be an order of index $m$ in the maximal order of a quadratic number field $k=\mathbb{Q}(\sqrt{d})$. Let ${\underline{\mathbf{O}}}_{d,m}$ be the orthogonal $\mathbb{…