Zhang, Xinguang; Liu, Lishan; Wu, Yonghong; Wiwatanapataphee, B.; Cui, Yujun Solvability and asymptotic properties for an elliptic geophysical fluid flows model in a planar exterior domain. (English) Zbl 1465.76107 Nonlinear Anal., Model. Control 26, No. 2, 315-333 (2021). MSC: 76U60 35Q35 35Q55 PDFBibTeX XMLCite \textit{X. Zhang} et al., Nonlinear Anal., Model. Control 26, No. 2, 315--333 (2021; Zbl 1465.76107) Full Text: DOI
Xu, Jiafa; Goodrich, Christopher S.; Cui, Yujun Positive solutions for a system of first-order discrete fractional boundary value problems with semipositone nonlinearities. (English) Zbl 1417.39030 Rev. R. Acad. Cienc. Exactas Fís. Nat., Ser. A Mat., RACSAM 113, No. 2, 1343-1358 (2019). MSC: 39A14 26A33 PDFBibTeX XMLCite \textit{J. Xu} et al., Rev. R. Acad. Cienc. Exactas Fís. Nat., Ser. A Mat., RACSAM 113, No. 2, 1343--1358 (2019; Zbl 1417.39030) Full Text: DOI
Wang, Fuli; Cui, Yujun Positive solutions for an infinite system of fractional order boundary value problems. (English) Zbl 1459.34079 Adv. Difference Equ. 2019, Paper No. 169, 11 p. (2019). MSC: 34B18 34A08 26A33 PDFBibTeX XMLCite \textit{F. Wang} and \textit{Y. Cui}, Adv. Difference Equ. 2019, Paper No. 169, 11 p. (2019; Zbl 1459.34079) Full Text: DOI
Zhang, Xinguang; Liu, Lishan; Wu, Yonghong; Cui, Yujun Nontrivial solutions for a fractional differential equation with nonlocal Riemann-Stieltjes boundary conditions. (English) Zbl 1412.34097 J. Nonlinear Sci. Appl. 10, No. 11, 6042-6055 (2017). MSC: 34B15 34B18 PDFBibTeX XMLCite \textit{X. Zhang} et al., J. Nonlinear Sci. Appl. 10, No. 11, 6042--6055 (2017; Zbl 1412.34097) Full Text: DOI
Cheng, Wei; Xu, Jiafa; Cui, Yujun Positive solutions for a system of nonlinear semipositone fractional \(q\)-difference equations with \(q\)-integral boundary conditions. (English) Zbl 1412.34080 J. Nonlinear Sci. Appl. 10, No. 8, 4430-4440 (2017). MSC: 34B10 34B18 34A34 45G15 45M20 PDFBibTeX XMLCite \textit{W. Cheng} et al., J. Nonlinear Sci. Appl. 10, No. 8, 4430--4440 (2017; Zbl 1412.34080) Full Text: DOI
Hao, Xinan; Wang, Huaqing; Liu, Lishan; Cui, Yujun Positive solutions for a system of nonlinear fractional nonlocal boundary value problems with parameters and \(p\)-Laplacian operator. (English) Zbl 1398.35269 Bound. Value Probl. 2017, Paper No. 182, 18 p. (2017). MSC: 35R11 PDFBibTeX XMLCite \textit{X. Hao} et al., Bound. Value Probl. 2017, Paper No. 182, 18 p. (2017; Zbl 1398.35269) Full Text: DOI
Cui, Yujun; Sun, Jingxian Existence of multiple positive solutions for fourth-order boundary value problems in Banach spaces. (English) Zbl 1281.34026 Bound. Value Probl. 2012, Paper No. 107, 13 p. (2012). MSC: 34B18 34B15 34G20 47N20 PDFBibTeX XMLCite \textit{Y. Cui} and \textit{J. Sun}, Bound. Value Probl. 2012, Paper No. 107, 13 p. (2012; Zbl 1281.34026) Full Text: DOI
Cui, Yujun Positive solutions of higher-order singular boundary value problems. (English) Zbl 1368.34034 J. Appl. Math. Comput. 37, No. 1-2, 193-205 (2011). MSC: 34B16 34B15 34B18 58E50 PDFBibTeX XMLCite \textit{Y. Cui}, J. Appl. Math. Comput. 37, No. 1--2, 193--205 (2011; Zbl 1368.34034) Full Text: DOI
Li, Hongyu; Sun, Jingxian; Cui, Yujun Positive solutions of superlinear nonlinear Sturm-Liouville boundary value problems. (Chinese. English summary) Zbl 1224.34065 Chin. Ann. Math., Ser. A 31, No. 2, 183-188 (2010). MSC: 34B18 34B24 47N20 PDFBibTeX XMLCite \textit{H. Li} et al., Chin. Ann. Math., Ser. A 31, No. 2, 183--188 (2010; Zbl 1224.34065)
Cui, Yujun; Tang, Xingdong; Wang, Feng Positive solutions of singular superlinear \((k,n-k)\) multi-point boundary value problems. (Chinese. English summary) Zbl 1224.34050 Acta Anal. Funct. Appl. 12, No. 1, 17-20 (2010). MSC: 34B16 34B10 34B18 47N20 PDFBibTeX XMLCite \textit{Y. Cui} et al., Acta Anal. Funct. Appl. 12, No. 1, 17--20 (2010; Zbl 1224.34050) Full Text: DOI
Cui, Yujun; Sun, Jingxian; Zou, Yumei Positive solutions of singular boundary value problems of fourth-order differential equations. (English) Zbl 1212.34054 J. Math. Res. Expo. 29, No. 2, 376-380 (2009). MSC: 34B18 34B16 47N20 PDFBibTeX XMLCite \textit{Y. Cui} et al., J. Math. Res. Expo. 29, No. 2, 376--380 (2009; Zbl 1212.34054) Full Text: DOI
Li, Hongyu; Sun, Jingxian; Cui, Yujun Positive solutions of nonlinear differential equations on a measure chain. (Chinese. English summary) Zbl 1199.34098 Chin. Ann. Math., Ser. A 30, No. 1, 97-106 (2009). MSC: 34B18 34N05 34B15 47N20 PDFBibTeX XMLCite \textit{H. Li} et al., Chin. Ann. Math., Ser. A 30, No. 1, 97--106 (2009; Zbl 1199.34098)
Li, Hongyu; Sun, Jingxian; Cui, Yujun Existence of positive solutions for double Hammerstein type integral equations. (Chinese. English summary) Zbl 1174.45309 Chin. J. Eng. Math. 25, No. 5, 931-934 (2008). MSC: 45M20 45G10 PDFBibTeX XMLCite \textit{H. Li} et al., Chin. J. Eng. Math. 25, No. 5, 931--934 (2008; Zbl 1174.45309)
Cui, Yujun; Zou, Yumei Existence of positive solutions for \(2n\)th-order singular superlinear boundary value problems. (English) Zbl 1165.34320 Comput. Math. Appl. 56, No. 12, 3195-3203 (2008). MSC: 34B18 34B16 PDFBibTeX XMLCite \textit{Y. Cui} and \textit{Y. Zou}, Comput. Math. Appl. 56, No. 12, 3195--3203 (2008; Zbl 1165.34320) Full Text: DOI
Li, Hongyu; Sun, Jingxian; Cui, Yujun Positive solutions to singular \(m\)-point boundary value problems of a coupled system of differential equations. (English) Zbl 1174.34016 Ann. Differ. Equations 24, No. 2, 163-170 (2008). MSC: 34B18 34B15 34B10 34B16 47N20 PDFBibTeX XMLCite \textit{H. Li} et al., Ann. Differ. Equations 24, No. 2, 163--170 (2008; Zbl 1174.34016)
Cui, Yujun; Zou, Yumei; Li, Hongyu Positive solutions of a class of singular superlinear boundary value problems of fourth order differential equations. (English) Zbl 1164.34353 Math. Appl. 21, No. 1, 156-161 (2008). MSC: 34B18 34B16 47N20 PDFBibTeX XMLCite \textit{Y. Cui} et al., Math. Appl. 21, No. 1, 156--161 (2008; Zbl 1164.34353)
Cui, Yujun; Zou, Yumei Positive solutions of nonlinear singular boundary value problems in abstract spaces. (English) Zbl 1148.34321 Nonlinear Anal., Theory Methods Appl., Ser. A, Theory Methods 69, No. 1, 287-294 (2008). MSC: 34G20 34B15 47H10 34B16 PDFBibTeX XMLCite \textit{Y. Cui} and \textit{Y. Zou}, Nonlinear Anal., Theory Methods Appl., Ser. A, Theory Methods 69, No. 1, 287--294 (2008; Zbl 1148.34321) Full Text: DOI
Zou, Yumei; Cui, Yujun; Li, Hongyu A necessary and sufficient condition for the existence of positive solutions of fourth-order singular boundary value problems. (Chinese. English summary) Zbl 1150.34377 J. Qufu Norm. Univ., Nat. Sci. 33, No. 1, 27-31 (2007). MSC: 34B18 34B16 47N20 PDFBibTeX XMLCite \textit{Y. Zou} et al., J. Qufu Norm. Univ., Nat. Sci. 33, No. 1, 27--31 (2007; Zbl 1150.34377)
Cui, Yujun; Zou, Yumei; Li, Hongyu Positive solution of second order singular boundary value problem. (English) Zbl 1121.34312 Ann. Differ. Equations 23, No. 1, 1-7 (2007). MSC: 34B15 PDFBibTeX XMLCite \textit{Y. Cui} et al., Ann. Differ. Equations 23, No. 1, 1--7 (2007; Zbl 1121.34312)
Cui, Yujun; Zou, Yumei Positive solutions of singular fourth-order boundary-value problems. (English) Zbl 1096.34012 Electron. J. Differ. Equ. 2006, Paper No. 39, 10 p. (2006). MSC: 34B18 34B15 34B16 PDFBibTeX XMLCite \textit{Y. Cui} and \textit{Y. Zou}, Electron. J. Differ. Equ. 2006, Paper No. 39, 10 p. (2006; Zbl 1096.34012) Full Text: EuDML EMIS