2 problems

Let $\tau$ be as in the surrounding discussion, and let $\theta_{\Delta(\tau,\ell)}\in\Theta_{\Delta(\tau,\ell)}$ and…

Let $1 \leq ell<n$. Let $\theta{\Delta(\tau,ell)}$ and $\theta{\Delta(\tau,2n+ell)}$ be given theta functions, and let $f'{\Delta(\tau,2n),s}$ be a section of the relevant induced represent…