On Fourier coefficients of elliptic modular forms $\mathrm{mod}\ell$ with applications to Siegel modular forms

Siegfried Böcherer, Soumya Das

We study several aspects of nonvanishing Fourier coefficients of elliptic modular forms $\mathrm{mod}\ell$, partially answering a question of Bellaïche-Soundararajan concerning the asymp…