ScalingStacks

Lemma 3.1. Let $k=\mathbb{F}_{q}$ or $k=\overline{\mathbb{F}}_{p}$, then

$\displaystyle\operatorname{Hom}_{\operatorname{DM}(k,\mathbb{Q})}(\mathbb{Q},\mathbb{Q}(m)[n])=\left\{\begin{array}[]{cl}\mathbb{Q}&\text{ for }n=m=0\text{ and}\\ 0&\text{otherwise.}\\ \end{array}\right.$