Sui, Yankun; Liu, Dan Error term concerning number of subgroups of group \(\mathbb{Z}_m \times \mathbb{Z}_n\) with \(m^2 + n^2 \le x\). (English) Zbl 1517.11124 Front. Math. China 17, No. 5, 987-999 (2022). Reviewer: László Tóth (Pécs) MSC: 11N37 11A25 20K01 20K27 PDFBibTeX XMLCite \textit{Y. Sui} and \textit{D. Liu}, Front. Math. China 17, No. 5, 987--999 (2022; Zbl 1517.11124) Full Text: DOI
Sui, Yankun; Liu, Dan On the average number of subgroups of the group \(\mathbb{Z}_m \times \mathbb{Z}_n\) with \(k\)-th power sequence. (English) Zbl 1509.11093 Ramanujan J. 58, No. 4, 1333-1351 (2022). Reviewer: Mehdi Hassani (Zanjan) MSC: 11N37 11N45 20K01 20K27 PDFBibTeX XMLCite \textit{Y. Sui} and \textit{D. Liu}, Ramanujan J. 58, No. 4, 1333--1351 (2022; Zbl 1509.11093) Full Text: DOI
Liu, Dan; Sui, Yankun On the error term \(\Delta_{(k,l)}(x)\). (English) Zbl 1499.11292 Ramanujan J. 58, No. 2, 523-548 (2022). MSC: 11N37 11M06 PDFBibTeX XMLCite \textit{D. Liu} and \textit{Y. Sui}, Ramanujan J. 58, No. 2, 523--548 (2022; Zbl 1499.11292) Full Text: DOI
Liu, Dan; Sui, Yankun Sign changes of \(\Delta_{(1)}(x)\). (English) Zbl 1497.11206 J. Number Theory 235, 401-419 (2022). MSC: 11M06 PDFBibTeX XMLCite \textit{D. Liu} and \textit{Y. Sui}, J. Number Theory 235, 401--419 (2022; Zbl 1497.11206) Full Text: DOI
Liu, D.; Sui, Y. On higher-power moments of \(\Delta(1)(x)\). (English) Zbl 1474.11163 Acta Math. Hung. 162, No. 2, 445-464 (2020). Reviewer: Stelian Mihalas (Timişoara) MSC: 11N37 11M06 PDFBibTeX XMLCite \textit{D. Liu} and \textit{Y. Sui}, Acta Math. Hung. 162, No. 2, 445--464 (2020; Zbl 1474.11163) Full Text: DOI
Sui, Yankun; Liu, Dan On the error term concerning the number of subgroups of the groups \(\mathbb{Z}_m \times \mathbb{Z}_n\) with \(mn \leq x\). (English) Zbl 1455.11130 J. Number Theory 216, 264-279 (2020). Reviewer: C. P. Anil Kumar (Chennai) MSC: 11N45 20K01 20K27 PDFBibTeX XMLCite \textit{Y. Sui} and \textit{D. Liu}, J. Number Theory 216, 264--279 (2020; Zbl 1455.11130) Full Text: DOI