Normalization of congruence of bitangents to a hypersurface in ${\mathbb{P}}^3$

Hosung Kim, Yongnam Lee

A congruence is a surface in the Grassmannian $\mathrm{Gr}(2,4)$. In this paper, we consider the normalization of congruence of bitangents to a hypersurface in ${\mathbb{P}}^3$. We call…