摘要
Ⅰ. INTRODUCTIONFor an integer q≥3, let X denote a typical Dirichlet character modulo q, and L(s, X) be the corresponding Dirichlet L-function. [1] studied the asymptotic property of mean value sum from X_q≠X_q^0 |L(1, X)|~4, and showed the following asymptotic formula: