Daniele Agostini, Hannah Markwig, Clemens Nollau, Victoria Schleis, Javier Sendra-Arranz, Bernd Sturmfels
Published 2022-05-23Version 1
We recover plane curves from their branch points under projection onto a line. Our focus lies on cubics and quartics. These have 6 and 12 branch points respectively. The plane Hurwitz numbers 40 and 120 count the orbits of solutions. We determine the numbers of real solutions, and we present exact algorithms for recovery. Our approach relies on 150 years of beautiful algebraic geometry, from Clebsch to Vakil and beyond.
The normal map for plane curves and pathologies in positive characteristic
On maps taking lines to plane curves
On the position of nodes of plane curves
![QR code for arXiv:2205.11287 [math.AG]](http://oss.arxitics.com/images/favicon.svg)