Home On the geometric trace of a generalized Selberg trace formula
Article
Licensed
Unlicensed Requires Authentication

On the geometric trace of a generalized Selberg trace formula

  • András Biró and Dávid Tóth EMAIL logo
Published/Copyright: April 24, 2024

Abstract

A certain generalization of the Selberg trace formula was proved by the first named author in 1999. In this generalization instead of considering the integral of K ( z , z ) (where K ( z , w ) is an automorphic kernel function) over the fundamental domain, one considers the integral of K ( z , z ) u ( z ) , where u ( z ) is a fixed automorphic eigenfunction of the Laplace operator. This formula was proved for discrete subgroups of PSL ( 2 , ) , and just as in the case of the classical Selberg trace formula it was obtained by evaluating in two different ways (“geometrically” and “spectrally”) the integral of K ( z , z ) u ( z ) . In the present paper we work out the geometric side of a further generalization of this generalized trace formula: we consider the case of discrete subgroups of PSL ( 2 , ) n where n > 1 . Many new difficulties arise in the case of these groups due to the fact that the classification of conjugacy classes is much more complicated for n > 1 than in the case n = 1 .

MSC 2020: 11F72

Communicated by Jan Frahm


Funding statement: The research reported in this paper is supported by the “TKP2020, National Challenges Program” of the National Research, Development and Innovation Office (BME NC TKP2020) and by the Ministry of Innovation and Technology and the National Research, Development and Innovation Office within the Artificial Intelligence National Laboratory of Hungary. It is also supported by the MTA–RI Lendület “Momentum” Analytic Number Theory and Representation Theory Research Group, by the NKFIH (National Research, Development and Innovation Office) grants FK 135218 (Dávid Tóth), K135885 and K 143876 (András Biró) and by the Rényi Intézet Lendület Automorphic Research Group.

References

[1] A. Biró, On a generalization of the Selberg trace formula, Acta Arith. 87 (1999), no. 4, 319–338. 10.4064/aa-87-4-319-338Search in Google Scholar

[2] A. Biró, Cycle integrals of Maass forms of weight 0 and Fourier coefficients of Maass forms of weight 1 / 2 , Acta Arith. 94 (2000), no. 2, 103–152. 10.4064/aa-94-2-103-152Search in Google Scholar

[3] A. Biró, A relation between triple products of weight 0 and weight 1 2 cusp forms, Israel J. Math. 182 (2011), 61–101. 10.1007/s11856-011-0024-6Search in Google Scholar

[4] A. Biró, Local average of the hyperbolic circle problem for Fuchsian groups, Mathematika 64 (2018), no. 1, 159–183. 10.1112/S0025579317000419Search in Google Scholar

[5] D. Bump, Automorphic Forms and Representations, Cambridge Stud. Adv. Math. 55, Cambridge University, Cambridge, 1998. 10.1017/CBO9780511609572Search in Google Scholar

[6] I. Y. Efrat, The Selberg trace formula for PSL 2 ( 𝐑 ) n , Mem. Amer. Math. Soc. 65 (1987), no. 359, 1–111. Search in Google Scholar

[7] E. Freitag, Hilbert Modular Forms, Springer, Berlin, 1990. 10.1007/978-3-662-02638-0Search in Google Scholar

[8] H. Iwaniec, Spectral Methods of Automorphic Forms, Grad. Stud. Math. 53, American Mathematical Society, Providence, 2002. 10.1090/gsm/053/05Search in Google Scholar

[9] H. L. Montgomery and R. C. Vaughan, Multiplicative Number Theory. I. Classical Theory, Cambridge Stud. Adv. Math. 97, Cambridge University, Cambridge, 2007. 10.1017/CBO9780511618314Search in Google Scholar

[10] A. Selberg, Harmonic analysis and discontinuous groups in weakly symmetric Riemannian spaces with applications to Dirichlet series, J. Indian Math. Soc. (N. S.) 20 (1956), 47–87. Search in Google Scholar

[11] H. Shimizu, On discontinuous groups operating on the product of the upper half planes, Ann. of Math. (2) 77 (1963), 33–71. 10.2307/1970201Search in Google Scholar

[12] C. L. Siegel, Advanced Analytic Number Theory, 2nd ed., Tata Inst. Fundam. Res. Stud. Math. 9, Tata Institute of Fundamental Research, Bombay, 1980. Search in Google Scholar

[13] D. Tóth, A generalization of the Selberg trace formula, Doctoral dissertation, Central European University, 2021, https://www.etd.ceu.edu/2021/toth_david.pdf. Search in Google Scholar

[14] J. L. Truelsen, Quantum unique ergodicity of Eisenstein series on the Hilbert modular group over a totally real field, Forum Math. 23 (2011), no. 5, 891–931. 10.1515/form.2011.031Search in Google Scholar

Received: 2023-09-25
Revised: 2024-03-12
Published Online: 2024-04-24
Published in Print: 2025-02-01

© 2024 Walter de Gruyter GmbH, Berlin/Boston

Downloaded on 7.9.2025 from https://www.degruyterbrill.com/document/doi/10.1515/forum-2023-0344/html
Scroll to top button