Li, Feng; Yu, Pei; Liu, Yirong; Liu, Yuanyuan Centers and isochronous centers of a class of quasi-analytic switching systems. (English) Zbl 1400.34044 Sci. China, Math. 61, No. 7, 1201-1218 (2018). Reviewer: Valery A. Gaiko (Minsk) MSC: 34C05 34A36 34C25 PDFBibTeX XMLCite \textit{F. Li} et al., Sci. China, Math. 61, No. 7, 1201--1218 (2018; Zbl 1400.34044) Full Text: DOI arXiv
Du, Chaoxiong; Liu, Yirong; Liu, Canhui Weak center problem and bifurcation of critical periods for a \(Z_4\)-equivariant cubic system. (English) Zbl 1383.34050 Adv. Difference Equ. 2013, Paper No. 197, 14 p. (2013). MSC: 34C05 34C14 34C23 PDFBibTeX XMLCite \textit{C. Du} et al., Adv. Difference Equ. 2013, Paper No. 197, 14 p. (2013; Zbl 1383.34050) Full Text: DOI
Zhang, Qi; Liu, Yirong; Chen, Haibo On the equivalence of singular point quantities and the integrability of a fine critical singular point. (English) Zbl 1238.34054 Nonlinear Anal., Real World Appl. 12, No. 5, 2794-2801 (2011). Reviewer: Armengol Gasull (Barcelona) MSC: 34C05 34C20 34C23 37C15 37G05 34A05 PDFBibTeX XMLCite \textit{Q. Zhang} et al., Nonlinear Anal., Real World Appl. 12, No. 5, 2794--2801 (2011; Zbl 1238.34054) Full Text: DOI
Du, Chaoxiong; Liu, Yirong; Mi, Heilong A class of ninth degree system with four isochronous centers. (English) Zbl 1165.34338 Comput. Math. Appl. 56, No. 10, 2609-2620 (2008). MSC: 34C07 34C05 PDFBibTeX XMLCite \textit{C. Du} et al., Comput. Math. Appl. 56, No. 10, 2609--2620 (2008; Zbl 1165.34338) Full Text: DOI
Wang, Qinlong; Liu, Yirong Linearizability of the polynomial differential systems with a resonant singular point. (English) Zbl 1138.34022 Bull. Sci. Math. 132, No. 2, 97-111 (2008). Reviewer: Alexey Remizov (Porto) MSC: 34C20 34C05 PDFBibTeX XMLCite \textit{Q. Wang} and \textit{Y. Liu}, Bull. Sci. Math. 132, No. 2, 97--111 (2008; Zbl 1138.34022) Full Text: DOI
Huang, Wentao; Liu, Yirong; Zhang, Weinian Conditions of infinity to be an isochronous centre for a rational differential system. (English) Zbl 1137.34015 Math. Comput. Modelling 46, No. 5-6, 583-594 (2007). Reviewer: Alexey Remizov (Porto) MSC: 34C05 34C07 34C25 PDFBibTeX XMLCite \textit{W. Huang} et al., Math. Comput. Modelling 46, No. 5--6, 583--594 (2007; Zbl 1137.34015) Full Text: DOI
Liu, Yirong; Huang, Wentao Center and isochronous center at infinity for differential systems. (English) Zbl 1048.34066 Bull. Sci. Math. 128, No. 2, 77-89 (2004). Reviewer: Valery A. Gaiko (Minsk) MSC: 34C05 34C25 PDFBibTeX XMLCite \textit{Y. Liu} and \textit{W. Huang}, Bull. Sci. Math. 128, No. 2, 77--89 (2004; Zbl 1048.34066) Full Text: DOI
Liu, Yirong; Huang, Wentao A new method to determine isochronous center conditions for polynomial differential systems. (English) Zbl 1034.34032 Bull. Sci. Math. 127, No. 2, 133-148 (2003). Reviewer: Alexander Grin (Grodno) MSC: 34C05 PDFBibTeX XMLCite \textit{Y. Liu} and \textit{W. Huang}, Bull. Sci. Math. 127, No. 2, 133--148 (2003; Zbl 1034.34032) Full Text: DOI