Stark’s Question on Special Values of $L$\textendash Functions
Stark’s Question on Special Values of $L$\textendash Functions
In 1980, Stark posed a far reaching question regarding the second derivatives at $s=0$ of $L$--functions of order of vanishing two associated to abelian extensions of number fields (global fields of characteristic $0$) (see \cite{St2}). Over the years, various mathematicians, most notably Grant \cite{Gra}, Sands \cite{Sa}, and Tangedal \cite{Tan} have …