Frobenius trace fields of cohomologically rigid local systems

Raju Krishnamoorthy, Yeuk Hay Joshua Lam

Let $X/\mathbb{C}$ be a smooth variety with simple normal crossings compactification $\bar{X}$, and let $L$ be an irreducible ${\overline{\mathbb{Q}}}_{\ell }$-local system on $X$ wit…