Abstract
We prove that for a certain class of n dimensional rank one locally symmetric spaces, if \(f \in L^p\), \(1\le p \le 2\), then the Riesz means of order z of f converge to f almost everywhere, for \(\mathrm {Re}z> (n-1)(1/p-1/2)\).
Similar content being viewed by others
Data Availability
Data sharing not applicable to this article as no datasets were generated or analyzed during the current study.
References
Alexopoulos, G., Lohoué, N.: Riesz means on Lie groups and Riemannian manifolds of nonnegative curvature. Bull. Soc. Math. France 122(2), 209–223 (1994)
Anker, J.-Ph., Damek, E., Yacoub, Ch.: Spherical analysis on harmonic \(NA\) groups. Annali Scuola Norm. Sup. di Pisa 23(4), 643–679 (1996)
Anker, J.-Ph., Ji, L.: Heat kernel and Green function estimates on noncompact symmetric spaces. Geom. Funct. Anal. 9(6), 1035–1091 (1999)
Anker, J.-Ph., Ostellari, P.: The heat kernel on noncompact symmetric spaces. Am. Math. Soc. Transl. Ser. 2 210, 27–46 (2003)
Berard, P.: Riesz means on Riemannian manifolds. Proc. Sympos. Pure Math. 36, 1–12 (1980)
Christ, M.: Weak type endpoint bounds for Bochner–Riesz operators. Rev. Mat. Iberoam. 3, 25–31 (1987)
Christ, M.: Weak type \((1,1)\) bounds for rough operators. Ann. Math. 128(2), 19–42 (1988)
Christ, M., Sogge, C.: Weak type \(L^1\) convergence of eigenfunction expansions for pseudodifferential operators. Invent. Math. 94, 421–453 (1988)
Clerc, J.L., Stein, E.M.: \(L^{p}\) multipliers for noncompact symmetric spaces. Proc. Nat. Acad. Sci. U. S. A. 71, 3911–3912 (1974)
Corlette, K.: Hausdorff dimensions of limit sets. I. Invent. Math. 102(3), 521–541 (1990)
Cowling, M.G.: Harmonic analysis on semigroups. Ann. Math. 117, 267–283 (1983)
Davies, E.B., Mandouvalos, N.: Heat kernel bounds on hyperbolic space and Kleinian groups. Proc. London Math. Soc. (3) 57(1), 182–208 (1988)
Davis, K., Chang, Y.: Lectures on Bochner–Riesz Means (London Mathematical Society Lecture Note Series). Cambridge University Press, Cambridge (1987)
Fotiadis, A., Papageorgiou, E.: Riesz means on symmetric spaces. J. Math. Anal. Appl. 499(1), 124970 (2021)
Giulini, S., Mauceri, G.: Almost everywhere convergence of Riesz means on certain noncompact symmetric spaces. Ann. di Mat. Pura ed Appl. 159, 357–369 (1991)
Giulini, S., Travaglini, G.: Estimates for Riesz kernels of eigenfunction expansions of elliptic differential operators on compact manifolds. J. Funct. Anal. 96, 1–30 (1991)
Grafakos, L.: Classical and Modern Fourier Analysis. Pearson Education, New Jersey (2004)
Grigor’yan, A.: Heat Kernel and Analysis on Manifolds, vol. 47. American Mathematical Society (2009)
Helgason, S.: Differential Geometry, Lie Groups, and Symmetric Spaces, 1st edn. Academic Press, New York (1978)
Helgason, S.: Geometric Analysis on Symmetric Spaces, Mathematical Surveys and Monographs, 2nd edn. American Mathematical Society (2008)
Hörmander, L.: On the Riesz Means of Spectral Functions and Eigenfunction Expansions for Elliptic Differential Operators. Some Recent Advances in the Basic Sciences, pp. 155–202. Yeshiva University, New York (1966)
Knieper, G.: On the asymptotic geometry of nonpositively curved manifolds. Geom. Funct. Anal. 7, 755–782 (1997)
Lizhen, J., Li, P., Wang, J.: Ends of locally symmetric spaces with maximal bottom spectrum. J. Reine Angew. Math. 632, 1–35 (2009)
Leuzinger, E.: Critical exponents of discrete groups and \(L^2\)-spectrum. Proc. Am. Math. Soc. 132(3), 919–927 (2004)
Nicholls, P.: The Ergodic Theory of Discrete Groups (London Mathematical Society Lecture Note Series). Cambridge University Press, Cambridge (1989)
Sogge, C.: On the convergence of Riesz means on compact manifolds. Ann. Math. 126(2), 439–447 (1987)
Stein, E.M., Weiss, G.: Introduction to Fourier Analysis on Euclidean Spaces. Princeton University Press, Princeton (1971)
Stein, E.M.: Topics in Harmonic Analysis Related to the Littlewood-Paley Theory, (AM-63), vol. 63. Princeton University Press, Princeton (1971)
Yue, C.: The ergodic theory of discrete isometry groups on manifolds of variable negative curvature Trans. Am. Math. Soc. 348, 4965–5005 (1996)
Zhang, H.-W.: Wave and Klein–Gordon equations on certain locally symmetric spaces. J. Geom. Anal. 30(4), 4386–4406 (2020)
Zhu, F.: Almost everywhere convergence of Riesz means on noncompact symmetric space \(SL(3, \mathbb{H})/Sp(3)\). Acta Math. Sin. New Ser. 13(4), 545–552 (1997)
Acknowledgements
The author would like to thank the referee for his/her critical comments and the careful and insightful review, as well as M. Kolountzakis and M. Papadimitrakis for conversations and remarks.
Funding
Supported by the Hellenic Foundation for Research and Innovation, Project HFRI-FM17-1733.
Author information
Authors and Affiliations
Ethics declarations
Conflict of interest
The author declares that there is no conflict of interest.
Additional information
Communicated by Andreas Seeger.
Publisher's Note
Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
Rights and permissions
About this article
Cite this article
Papageorgiou, E. Riesz Means on Locally Symmetric Spaces. Complex Anal. Oper. Theory 16, 43 (2022). https://doi.org/10.1007/s11785-022-01226-7
Received:
Accepted:
Published:
DOI: https://doi.org/10.1007/s11785-022-01226-7