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Analysis establishes sharp lower and upper bounds for Dirichlet L-functions, indicating their behavior on the critical line.
We study the $2k$-th moment of the family of Dirichlet L-functions to a fixed prime modulus on the critical line and establish sharp lower bounds for all real k ≥ 0 and sharp upper bounds for k in the range 0 ≤ k ≤ 1.
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Gao et al. (2025) studied this question.
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