Moduli Spaces of Shtukas over the Projective Line

Abstract

We provide explicit equations for moduli spaces of Drinfeld shtukas over the projective line with $\Gamma(N)$, $\Gamma_1(N)$ and $\Gamma_0(N)$ level structures, where $N$ is an effective divisor on $\mathbb{P}^1$. If the degree of $N$ is high enough, these moduli spaces are relative surfaces. We study some invariants of the moduli space of shtukas with $\Gamma_0(N)$ level structure for several degree $4$ divisors on $\mathbb{P}^1$.