複素多様体論 I,II,III
《複素多様体論 I,II,III》 · 第 20 页 · Section 2.6「The singular series」
The singular series reflects the distribution of the $k$th power residues modulo $q$. Before investigating the properties of $\mathfrak S(n)$ it is necessary to examine $S(q,a)$ and $S(q)$.