Mukai lifting of self-dual points in P^6
- Leonie Kayser
Abstract
A set of 2n points in ℙ^{n-1} is self-dual if it is invariant under the Gale transform. Motivated by Mukai's work on canonical curves, Petrakiev showed that a general self-dual set of 14 points in ℙ^6 arises as the intersection of the Grassmannian Gr(2,6) in its Plücker embedding in ℙ^14 with a linear space of dimension 6. In this work we focus on the inverse problem of recovering such a linear space associated to a general self-dual set of points. We use numerical homotopy continuation to approach the problem and implement an algorithm in Julia to solve it. Along the way we also implement the forward problem of slicing Grassmannians and use it to experimentally study the real solutions to this problem. The presentation features a brief introduction to the topic as well as a demonstration of the implementation. This is joint work with Barbara Betti.