Classification of monads and a new moduli component of stable rank 2 bundles on ${\mathbb{P}}^3$ with even determinant and $c_2=9$

Abstract

The goal of this paper is to classify all minimal monads whose cohomology is a stable rank 2 bundle on ${\mathbb{P}}^3$ with Chern classes $c_1=0$ and $c_2=9$, with possible exception of two non-negative minimal monads, and thus we extend the classification of the minimal monads made by Hartshorne and Rao in \cite[Section 5.3]{HR91} when $c_2\le 8$. We also prove the existence of a new component of the moduli space $\mathcal{B}(9)$ which is distinct from the Hartshorne and Ein components.

16 pages