Endoscopic lifts to the Siegel modular threefold related to Klein’s cubic threefold
Endoscopic lifts to the Siegel modular threefold related to Klein’s cubic threefold
Let ${\cal{A}}^{lev}_{11}$ be the moduli space of $(1,11)$-polarized abelian surfaces with a canonical level structure. Let $\chi$ be a primitive character of order 5 with conductor 11. In this paper we construct five endoscopic lifts $\Pi_i$, $0\le i\le 4$ from two elliptic modular forms $f\otimes\chi^i$ of weight 2 and $g\otimes\chi^i$ …