Characterizing Jacobians via flexes of the Kummer variety

E. Arbarello, G. Marini, I. Krichever

Given an abelian variety $X$ and a point $a\in X$ we denote by $<a>$ the closure of the subgroup of $X$ generated by $a$. Let $N=2^g-1$. We denote by $κ: X\to κ(X)\subset\mathbb P^…