Published online by Cambridge University Press: 28 August 2018
We prove the reciprocity law for the twisted second moments of Dirichlet $L$-functions over rational function fields, corresponding to
two irreducible polynomials. This formula is the analogue of the formulas
for Dirichlet
$L$-functions over
$\mathbb{Q}$ obtained by Conrey [‘The mean-square of Dirichlet
$L$-functions’, arXiv:0708.2699 [math.NT] (2007)] and Young [‘The reciprocity law
for the twisted second moment of Dirichlet
$L$-functions’, Forum Math.
23(6) (2011), 1323–1337].
This work was partially supported by the Ministry of Education, Science and Technological Development of Republic of Serbia, Project no. 174008.