3 problems

Traverso's truncation conjecture. One has

Supersingularity conjecture. If $X$ is second-Artin supersingular, then:

Let $k$ be an algebraically closed field of characteristic $p>0$, and let $X$ be a K3 surface over $k$. The Picard rank of $X$ is the rank of its Picard group, and $X$ is supersing…