The scrollar invariants of k-gonal curves having a nodal model on a smooth quadric having its nodes on few lines

Marc Coppens

We determine the scrollar invariants of the normalization $C$ of a nodal curve $\Gamma$ of type $(k,a)$ on a smooth quadric ${\mathbb{P}}^1\times {\mathbb{P}}^1$ associated to the $g_k^1$…