Dirichlet L-functions;
characters;
cotangent;
mean value;
D O I:
10.1090/proc/16960
中图分类号:
O29 [应用数学];
学科分类号:
070104 ;
摘要:
Let m >= 1 be a rational integer. We give an explicit formula for the mean value 2/phi(f) Sigma(chi(-1)=(-1)m) vertical bar L(m, chi)vertical bar(2), where chi ranges over the phi(f)/2 Dirichlet characters modulo f > 2 with the same parity as m. We then adapt our proof to obtain explicit means values for products of the form L(m(1), chi(1)) ... L(m(n-1,) chi(n-1))<(L(m(n), chi(1) ... chi(n-1)))over bar>.