2 problems

Proposed conjecture. Every such polynomial admits a linear Pfaffian $R$-representation. Moreover, when $d\geq 5$, such a representation can be found using the empirical method desc…

Let $S(F)$ be the plane quartic under consideration, let $Ar$ be its associated Pfaffian representation, and let ${\mathcal L}_{\vartheta}$ be an even theta characteristic on…