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We describe a construction of preimages for the Shimura map on Hilbert modular forms using generalized theta series, and give an explicit Waldspurger type formula relating their Fourier coefficients to central values of twisted…

Number Theory · Mathematics 2020-07-31 Nicolás Sirolli , Gonzalo Tornaría

In this article we give a method to construct preimages for the Shimura correspondence on Hilbert modular forms of odd and square-free level. The method relies in the ideas presented for the rational case by Pacetti and Tornar\'ia, and is…

Number Theory · Mathematics 2014-09-26 Nicolás Sirolli

Let f be a newform of weight two, prime level p. If D is a fundamental discriminant, define the twisted L-function L(f,D,s) to be the L-function associated to the twist of f by the quadratic character of conductor D. In this paper we…

Number Theory · Mathematics 2021-07-14 Zhengyu Mao , Fernando Rodriguez-Villegas , Gonzalo Tornaría

Given a Hilbert cuspidal newform $g$ we construct a family of modular forms of half-integral weight whose Fourier coefficients give the central values of the twisted $L$-series of $g$ by fundamental discriminants. The family is parametrized…

Number Theory · Mathematics 2022-10-14 Nicolás Sirolli , Gonzalo Tornaría

We use relative trace formula to prove a non-vanishing result and a subconvexity result for the twisted base change $L$-functions associated to Hilbert modular forms whose local components at ramified places are some supercuspidal…

Number Theory · Mathematics 2017-09-12 Qinghua Pi

In this article, we prove an explicit Waldspurger formula for the toric Hilbert modular forms. As an application, we construct a class of anticyclotomic p-adic Rankin-Selberg L-functions for Hilbert modular forms, generalizing the…

Number Theory · Mathematics 2012-08-24 Ming-Lun Hsieh

The goal of this paper is to explicitly compute the Kodaira-Spencer maps over Hilbert-Siegel modular varieties and twisted Hilbert modular varieties and their effects on the metrics of the Hodge bundle. Our result is a generalization of the…

Number Theory · Mathematics 2023-08-16 Ziqi Guo

Let $k$ be a positive integer such that $k\equiv3\mod4$, and let $N$ be a positive square-free integer. In this paper, we compute a basis for the two-dimensional subspace $S_{\frac{k}{2}}(\Gamma_{0}(4N),F)$ of half-integral weight modular…

Number Theory · Mathematics 2016-09-26 Alia Hamieh

In the 1980s B\"ocherer formulated a conjecture relating the central values of the imaginary quadratic twists of the spin L-function attached to a Siegel modular form $F$ to the Fourier coefficients of $F$. This conjecture has been proved…

Number Theory · Mathematics 2012-06-04 Nathan C. Ryan , Gonzalo Tornaría

In this paper, we give a method to construct a classical modular form from a Hilbert modular form. By applying this method, we can get linear formulas which relate the Fourier coefficients of the Hilbert and classical modular forms. The…

Number Theory · Mathematics 2017-11-02 Ren-He Su

We give an exact formula of the average of adjoint $L$-functions of holomorphic Hilbert cusp forms with a fixed weight and a square-free level, which is a generalization of Zagier's formula known for the case of elliptic cusp forms on ${\rm…

Number Theory · Mathematics 2022-10-21 Shingo Sugiyama , Masao Tsuzuki

Given a weight 2 and level p^2 modular form f, we construct two weight 3/2 modular forms (possibly zero) of level 4p^2 and non trivial character mapping to f via the Shimura correspondence. Then we relate the coefficients of the constructed…

Number Theory · Mathematics 2021-07-14 Ariel Pacetti , Gonzalo Tornaría

We describe algorithms for computing central values of twists of $L$-functions associated to Hilbert modular forms, carry out such computations for a number of examples, and compare the results of these computations to some heuristics and…

Number Theory · Mathematics 2014-08-13 Nathan C. Ryan , Gonzalo Tornaria , John Voight

We use the relative trace formula to obtain exact formulas for central values of certain twisted quadratic base change L-functions averaged over Hilbert modular forms of a fixed weight and level. We apply these formulas to the subconvexity…

Number Theory · Mathematics 2019-12-19 Brooke Feigon , David Whitehouse

For a given cusp form $\phi$ of even integral weight satisfying certain hypotheses, Waldspurger's Theorem relates the critical value of the $\mathrm{L}$-function of the $n$-th quadratic twist of $\phi$ to the $n$-th coefficient of a certain…

Number Theory · Mathematics 2019-02-20 Soma Purkait

Associated to an (adelic) Hilbert modular form is a sequence of `Fourier coefficients' which uniquely determine the form. In this paper we characterize Hilbert modular cusp forms by the size of their Fourier coefficients. This answers in…

Number Theory · Mathematics 2012-05-21 Benjamin Linowitz

We give an explicit form of Gross-Zagier formula on Shimura Curves and an explicit form of Waldspurger formula.

Number Theory · Mathematics 2016-01-20 Li Cai , Jie Shu , Ye Tian

Let $F$ (over $\mathbb{Q}$) be a totally real number field of narrow class number $1$. We generalize a result of Kohnen on the determination of half integral weight modular forms by their Fourier coefficients supported on squarefree…

Number Theory · Mathematics 2024-11-26 Rishabh Agnihotri , Krishnarjun Krishnamoorthy

In a paper published in 1959, Shimura presented an elegant calculation of the critical values of L-functions attached to elliptic modular forms using the first cohomology group. We will show that a similar calculation is possible for…

Number Theory · Mathematics 2015-01-14 Hiroyuki Yoshida

We construct p-adic L-functions associated to cuspidal Hilbert modular eigenforms of parallel weight two in certain dihedral or anticyclotomic extensions via the Jacquet-Langlands correspondence, generalizing works of Bertolini-Darmon,…

Number Theory · Mathematics 2019-03-19 Jeanine Van Order
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