Zhang, Yali Existence of positive solutions for a class of second-order difference equation Dirichlet boundary problems with sign-changing weight function. (Chinese. English summary) Zbl 1474.39044 J. Sichuan Univ., Nat. Sci. Ed. 57, No. 3, 455-458 (2020). MSC: 39A27 39A12 34B18 PDFBibTeX XMLCite \textit{Y. Zhang}, J. Sichuan Univ., Nat. Sci. Ed. 57, No. 3, 455--458 (2020; Zbl 1474.39044) Full Text: DOI
Yang, Hujun; Han, Xiaoling; Luo, Qiang Existence of periodic solutions for a class of nonautonomous third-order ordinary differential equations. (Chinese. English summary) Zbl 1463.34160 J. Sichuan Univ., Nat. Sci. Ed. 57, No. 3, 450-454 (2020). MSC: 34C25 37C60 47N20 PDFBibTeX XMLCite \textit{H. Yang} et al., J. Sichuan Univ., Nat. Sci. Ed. 57, No. 3, 450--454 (2020; Zbl 1463.34160) Full Text: DOI
He, Dingyu Existence of solutions for a class of boundary value problem of high-order fractional differential equations. (Chinese. English summary) Zbl 1463.34014 J. Sichuan Univ., Nat. Sci. Ed. 57, No. 3, 443-449 (2020). MSC: 34A08 34B15 47N20 PDFBibTeX XMLCite \textit{D. He}, J. Sichuan Univ., Nat. Sci. Ed. 57, No. 3, 443--449 (2020; Zbl 1463.34014) Full Text: DOI
Zhou, Xingwang A number theoretic method for high order correlation functions of the Ulam map. (English) Zbl 1463.11104 J. Sichuan Univ., Nat. Sci. Ed. 57, No. 3, 435-442 (2020). MSC: 11D41 11D61 PDFBibTeX XMLCite \textit{X. Zhou}, J. Sichuan Univ., Nat. Sci. Ed. 57, No. 3, 435--442 (2020; Zbl 1463.11104) Full Text: DOI
Feng, Yulu; Zhao, Wei On the integrality of the second elementary symmetric function of \(1, 1/{3^{s_1}}, \cdots, 1/(2n - 1)^{s_{n - 1}}\). (English) Zbl 1463.11089 J. Sichuan Univ., Nat. Sci. Ed. 57, No. 3, 431-434 (2020). MSC: 11B83 11B75 11B25 PDFBibTeX XMLCite \textit{Y. Feng} and \textit{W. Zhao}, J. Sichuan Univ., Nat. Sci. Ed. 57, No. 3, 431--434 (2020; Zbl 1463.11089) Full Text: DOI
Chen, Xi; Liu, Lubo; Ji, Yuandong; Zhang, Lu A new SAR imaging algorithm based on two-dimensional exponential pulse compression transform. (Chinese. English summary) Zbl 1463.94002 J. Sichuan Univ., Nat. Sci. Ed. 57, No. 3, 425-430 (2020). MSC: 94A08 PDFBibTeX XMLCite \textit{X. Chen} et al., J. Sichuan Univ., Nat. Sci. Ed. 57, No. 3, 425--430 (2020; Zbl 1463.94002) Full Text: DOI
Yu, Junche Continuous generalized metric spaces. (English) Zbl 1463.54080 J. Sichuan Univ., Nat. Sci. Ed. 57, No. 3, 417-424 (2020). MSC: 54E35 54C05 PDFBibTeX XMLCite \textit{J. Yu}, J. Sichuan Univ., Nat. Sci. Ed. 57, No. 3, 417--424 (2020; Zbl 1463.54080) Full Text: DOI