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We evaluate some twisted fourth moment of Dirichlet $L$-functions at the central point s=1/2 and for prime moduli q. The principal tool is a careful analysis of a shifted convolution problem involving the divisor function using spectral…

Number Theory · Mathematics 2019-12-04 Raphaël Zacharias

We evaluate the twisted four moment on the critical line of the family of Dirichlet $L$-functions to a fixed prime power modulus, obtaining an asymptotic formula with a power saving error term.

Number Theory · Mathematics 2025-07-25 Peng Gao , Liangyi Zhao

For a positive integer $q\not\equiv 2 \pmod 4$, this work considers the fourth moment of Dirichlet $L$-functions averaged over both $t\in [0,T]$ and primitive characters to modulus $q$. An asymptotic formula with a power saving from both…

Number Theory · Mathematics 2022-10-14 Xiaosheng Wu

We compute the fourth moment of Dirichlet L-functions at the central point for prime moduli, with a power savings in the error term.

Number Theory · Mathematics 2013-03-27 Matthew P. Young

We prove an asymptotic formula for the fourth power mean of Dirichlet L-functions averaged over primitive characters to modulus q and over t\in [0,T] which is particularly effective when q \ge T. In this range the correct order of magnitude…

Number Theory · Mathematics 2015-05-13 H. M. Bui , D. R. Heath-Brown

We obtain an asymptotic formula for the fourth moment of quadratic Dirichlet $L$--functions over $\mathbb{F}_q[x]$, as the base field $\mathbb{F}_q$ is fixed and the genus of the family goes to infinity. According to conjectures of Andrade…

Number Theory · Mathematics 2016-09-06 Alexandra Florea

The asymptotic formula of the fourth moment of Dirichlet $L$-functions at the central value was predicted in a conjecture by J. B. Conrey, D. W. Farmer, J. P. Keating, M. O. Rubinstein, and N. C. Snaith, and the prime moduli case was proved…

Number Theory · Mathematics 2022-10-14 Xiaosheng Wu

We establish an asymptotic formula with a power-saving error term for the twisted mixed moment of Dirichlet $L$-functions and automorphic $L$-functions twisted by all primitive characters modulo $q$, valid for all admissible moduli. As a…

Number Theory · Mathematics 2025-12-11 Zhenpeng Tang , Xiaosheng Wu

We compute asymptotic formulae for the mollified first and second moments for the family of quadratic Dirichlet $L$-functions in the function field setting. As an application, we obtain non-vanishing results for the derivatives of the…

Number Theory · Mathematics 2024-12-03 Julio C. Andrade , Christopher G. Best

We prove an asymptotic formula for the second moment of a product of two Dirichlet L-functions on the critical line, which has a power saving in the error term and which is uniform with respect to the involved Dirichlet characters. As…

Number Theory · Mathematics 2021-06-04 Berke Topacogullari

We study the moments of the Dirichlet L-function when defined over the polynomial ring over finite fields. We find an asymptotic formula to the fourth moment of the central value of Dirichlet L functions in this context. We also find a…

Number Theory · Mathematics 2013-01-01 Nattalie Tamam

Extending a result of Heath-Brown, we establish an asymptotic formula for the fourth moment of central values of Dirichlet $L$-functions attached to primitive characters $\pmod q$.

Number Theory · Mathematics 2007-05-23 K. Soundararajan

We study the fourth moment of quadratic Dirichlet $L$-functions at $s= \frac{1}{2}$. We show an asymptotic formula under the generalized Riemann hypothesis, and obtain a precise lower bound unconditionally. The proofs of these results…

Number Theory · Mathematics 2020-07-29 Quanli Shen

We prove an asymptotic formula with four main terms for the fourth moment of quadratic Dirichlet $L$-functions unconditionally. Our proof is based on the work of Li , Soundararajan, and Soundararajan-Young. Our proof requires several new…

Number Theory · Mathematics 2024-02-05 Quanli Shen , Joshua Stucky

There has recently been some interest in optimizing the error term in the asymptotic for the fourth moment of Dirichlet L-functions and a closely related mixed moment of L-functions involving automorphic L-functions twisted by Dirichlet…

Number Theory · Mathematics 2024-01-04 Rizwanur Khan , Zeyuan Zhang

We prove a Lindel\"of-on-average upper bound for the fourth moment of Dirichlet $L$-functions of conductor $q$ along a coset of the subgroup of characters modulo $d$ when $q^*|d$, where $q^*$ is the least positive integer such that…

Number Theory · Mathematics 2026-05-06 Ian Petrow , Matthew P. Young

We study the average of the product of the central values of two $L$-functions of modular forms $f$ and $g$ twisted by Dirichlet characters to a large prime modulus $q$. As our principal tools, we use spectral theory to develop bounds on…

Number Theory · Mathematics 2020-04-28 Valentin Blomer , Étienne Fouvry , Emmanuel Kowalski , Philippe Michel , Djordje Milićević

We prove an asymptotic formula for the second moment of central values of Dirichlet $L$-functions restricted to a coset. More specifically, consider a coset of the subgroup of characters modulo $d$ inside the full group of characters modulo…

Number Theory · Mathematics 2026-05-06 Bradford Garcia , Matthew P. Young

We study the second moment of Dirichlet $L$-functions to a large prime modulus $q$ twisted by the square of an arbitrary Dirichlet polynomial. We break the $\frac{1}{2}$-barrier in this problem, and obtain an asymptotic formula provided…

Number Theory · Mathematics 2018-09-03 H. M. Bui , Kyle Pratt , Nicolas Robles , Alexandru Zaharescu

We extend the work of Fouvry, Kowalski and Michel on correlation between Hecke eigenvalues of modular forms and algebraic trace functions in order to establish an asymptotic formula for a generalized cubic moment of modular L-functions at…

Number Theory · Mathematics 2017-07-05 Raphael Zacharias
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