Abstract
Let f, g be two distinct primitive holomorphic cusp forms of even integral weights \(k_{1},k_{2}\) for the full modular group \(\Gamma =SL(2,\mathbb {Z})\), respectively. In this paper, we are interested in the upper bounds for the integral mean square of error terms involving \(\lambda _{f}^{2i_{1}}(n), \lambda _{f}^{2}(n^{j_{1}})\) and \(\lambda _{f}^{2}(n^{i_{2}})\lambda _{g}^{2}(n^{j_{2}})\) on average in terms of f, g respectively. Here \(i_{1}\ge 2, j_{1}\ge 3\) and \(i_{2},j_{2}\ge 1\) are positive integers.
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Acknowledgements
The author would like to express his gratitude to Professors Guangshi Lü, Bin Chen, Bingrong Huang and Research Fellow, Zhiwei Wang for their constant encouragement and valuable suggestions. The author is extremely grateful to the anonymous referees for their meticulous checking, for thoroughly reporting countless typos and inaccuracies as well as for their valuable comments. These corrections and additions have made the manuscript clearer and readable. This work was financially supported in part by The National Key Research and Development Program of China (Grant No. 2021YFA1000700), Natural Science Basic Research Program of Shaanxi (Program Nos 2023-JC-QN-0024 and 2023-JC-YB-077), Foundation of Shaanxi Educational Committee (2023-JCYB- 013) and Shaanxi Fundamental Science Research Project for Mathematics and Physics (Grant No. 22JSQ010).
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Hua, G. Integral mean-square estimation of error terms of Fourier coefficients attached to cusp forms. Proc Math Sci 133, 17 (2023). https://doi.org/10.1007/s12044-023-00737-3
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DOI: https://doi.org/10.1007/s12044-023-00737-3