I am working through a problem set in an analytic number theory course, and the following problem was included:
Show that if $\chi$ is a non-principal Dirichlet character $\pmod{m}$, and where $L(s, \chi)$ is an $L$-function, then $$L(0, \chi) = \frac{-1}{m} \sum_{c=1}^m \chi(c) c,$$ and $$L'(0, \chi) = L(0, \chi) \log m + \sum_{c=1}^m \chi(c) \log \Gamma (\frac{c}{m}).$$
WARNING: The professor writing these problems has an unfortunate habit of teXing problems up incorrectly! Hence part of the "fun" for students taking the course is to figure out if the statement of the problem itself is correct, and if not, to figure out how to modify the statement to make it workable.
I am wondering if anyone visiting would be able to tell whether the problem as stated is right (and if so, suggest a strategy for proving it); if the statement is false, I am curious to know if anyone could either suggest how to modify the statement to be workable, or even point me in the direction of a text that contains a correct statement.