Li, Yuan; Luo, Jiagui Extension of the Stormer theorem. (Chinese. English summary) Zbl 1463.11100 J. Nat. Sci. Heilongjiang Univ. 37, No. 2, 167-172 (2020). MSC: 11D09 PDFBibTeX XMLCite \textit{Y. Li} and \textit{J. Luo}, J. Nat. Sci. Heilongjiang Univ. 37, No. 2, 167--172 (2020; Zbl 1463.11100) Full Text: DOI
Hu, Xiaona; Yue, Xiaorui; Li, Shengjun The least energy solution for \(k\)-coupled Schrödinger equations with critical exponent. (Chinese. English summary) Zbl 1449.35044 J. Nat. Sci. Heilongjiang Univ. 36, No. 4, 420-425 (2019). MSC: 35B33 35Q55 PDFBibTeX XMLCite \textit{X. Hu} et al., J. Nat. Sci. Heilongjiang Univ. 36, No. 4, 420--425 (2019; Zbl 1449.35044) Full Text: DOI
Zhu, Limei Positive periodic solutions for the second-order differential equations with delayed derivative terms. (Chinese. English summary) Zbl 1424.34240 J. Nat. Sci. Heilongjiang Univ. 35, No. 2, 164-170 (2018). MSC: 34K13 47N20 PDFBibTeX XMLCite \textit{L. Zhu}, J. Nat. Sci. Heilongjiang Univ. 35, No. 2, 164--170 (2018; Zbl 1424.34240) Full Text: DOI
Liang, Sihua; Song, Yang; Ding, Jing; Yang, Zedong Existence of positive solutions for nonlinear fractional order multipoint boundary value problem. (Chinese. English summary) Zbl 1413.34031 J. Nat. Sci. Heilongjiang Univ. 34, No. 6, 661-665 (2017). MSC: 34A08 34B18 34B10 PDFBibTeX XMLCite \textit{S. Liang} et al., J. Nat. Sci. Heilongjiang Univ. 34, No. 6, 661--665 (2017; Zbl 1413.34031) Full Text: DOI
Zhang, Xiaofeng; Feng, Hanying Eigenvalue intervals for a system of nonlinear differential equations of mixed fractional orders. (English) Zbl 1413.34055 J. Nat. Sci. Heilongjiang Univ. 34, No. 6, 650-660 (2017). MSC: 34A08 34B09 34B18 PDFBibTeX XMLCite \textit{X. Zhang} and \textit{H. Feng}, J. Nat. Sci. Heilongjiang Univ. 34, No. 6, 650--660 (2017; Zbl 1413.34055) Full Text: DOI
Xu, Aijuan; Deng, Moujie On the Diophantine equation \(p^x + (p + 1)^y =z^2\). (Chinese. English summary) Zbl 1389.11090 J. Nat. Sci. Heilongjiang Univ. 33, No. 6, 766-769 (2016). MSC: 11D61 PDFBibTeX XMLCite \textit{A. Xu} and \textit{M. Deng}, J. Nat. Sci. Heilongjiang Univ. 33, No. 6, 766--769 (2016; Zbl 1389.11090) Full Text: DOI
Yong, Longquan An improved global harmony search algorithm for linear complementarity problem. (Chinese. English summary) Zbl 1340.90251 J. Nat. Sci. Heilongjiang Univ. 31, No. 5, 589-596 (2014). MSC: 90C33 65K10 PDFBibTeX XMLCite \textit{L. Yong}, J. Nat. Sci. Heilongjiang Univ. 31, No. 5, 589--596 (2014; Zbl 1340.90251) Full Text: DOI
He, Wenkui Existence of positive solutions of a singular second-order Neumann boundary value problem. (Chinese. English summary) Zbl 1313.34070 J. Nat. Sci. Heilongjiang Univ. 31, No. 1, 46-50 (2014). MSC: 34B18 34B16 34B27 47N20 PDFBibTeX XMLCite \textit{W. He}, J. Nat. Sci. Heilongjiang Univ. 31, No. 1, 46--50 (2014; Zbl 1313.34070) Full Text: DOI
Chen, Wei Existence of positive periodic solutions for second order differential equations. (Chinese. English summary) Zbl 1299.34146 J. Nat. Sci. Heilongjiang Univ. 30, No. 3, 290-295 (2013). MSC: 34C25 34B27 34B18 47N20 PDFBibTeX XMLCite \textit{W. Chen}, J. Nat. Sci. Heilongjiang Univ. 30, No. 3, 290--295 (2013; Zbl 1299.34146)
He, Mingyang; Yao, Huanmin The symmetric positive solution for nonlinear singular BVPs of fourth-order with nonlocal boundary conditions. (English) Zbl 1249.34071 J. Nat. Sci. Heilongjiang Univ. 28, No. 3, 352-359 (2011). MSC: 34B18 34B10 34B16 34C14 34A45 PDFBibTeX XMLCite \textit{M. He} and \textit{H. Yao}, J. Nat. Sci. Heilongjiang Univ. 28, No. 3, 352--359 (2011; Zbl 1249.34071)
Yao, Qingliu A class of third-order semipositone boundary value problems with Carathéodory nonlinear term. (Chinese. English summary) Zbl 1240.34130 J. Nat. Sci. Heilongjiang Univ. 27, No. 5, 565-568 (2010). MSC: 34B18 34B15 47N20 PDFBibTeX XMLCite \textit{Q. Yao}, J. Nat. Sci. Heilongjiang Univ. 27, No. 5, 565--568 (2010; Zbl 1240.34130)
Li, Caijuan An equation involving two Smarandache functions and its positive integer solutions. (Chinese. English summary) Zbl 1240.11013 J. Nat. Sci. Heilongjiang Univ. 27, No. 4, 446-448, 454 (2010). MSC: 11A25 PDFBibTeX XMLCite \textit{C. Li}, J. Nat. Sci. Heilongjiang Univ. 27, No. 4, 446--448, 454 (2010; Zbl 1240.11013)
Yao, Qingliu Partial positive solutions of a class of nonlinear second-order three-point boundary value problems. (Chinese. English summary) Zbl 1224.34039 J. Nat. Sci. Heilongjiang Univ. 27, No. 1, 1-4 (2010). MSC: 34B10 34B18 PDFBibTeX XMLCite \textit{Q. Yao}, J. Nat. Sci. Heilongjiang Univ. 27, No. 1, 1--4 (2010; Zbl 1224.34039)
Zhou, Qiaoshu; Jiang, Daqing Multiple positive solutions to Neumann’s boundary value problems of second order impulsive differential equations. (Chinese. English summary) Zbl 1199.34151 J. Nat. Sci. Heilongjiang Univ. 25, No. 5, 671-675, 680 (2008). MSC: 34B37 34B18 PDFBibTeX XMLCite \textit{Q. Zhou} and \textit{D. Jiang}, J. Nat. Sci. Heilongjiang Univ. 25, No. 5, 671--675, 680 (2008; Zbl 1199.34151)
Yao, Qingliu A monotone iterative method of positive solution to a class of nonlinear elastic beam equations. (Chinese. English summary) Zbl 1199.65254 J. Nat. Sci. Heilongjiang Univ. 25, No. 2, 144-148 (2008). MSC: 65L10 74K10 34B15 PDFBibTeX XMLCite \textit{Q. Yao}, J. Nat. Sci. Heilongjiang Univ. 25, No. 2, 144--148 (2008; Zbl 1199.65254)
Deng, Yihua; Qiu, Dehua The existence and uniqueness of positive solution for a class of boundary value problems with \(p\)-Laplacian operator. (Chinese. English summary) Zbl 1150.34355 J. Nat. Sci. Heilongjiang Univ. 24, No. 6, 837-840 (2007). MSC: 34B18 34B15 PDFBibTeX XMLCite \textit{Y. Deng} and \textit{D. Qiu}, J. Nat. Sci. Heilongjiang Univ. 24, No. 6, 837--840 (2007; Zbl 1150.34355)
Yao, Huili; Xu, Guangtao Existence of positive almost periodic type solutions for some nonlinear delay integral equations. (Chinese. English summary) Zbl 1150.45320 J. Nat. Sci. Heilongjiang Univ. 24, No. 4, 493-497 (2007). MSC: 45M15 45G10 92D25 92D30 45M20 PDFBibTeX XMLCite \textit{H. Yao} and \textit{G. Xu}, J. Nat. Sci. Heilongjiang Univ. 24, No. 4, 493--497 (2007; Zbl 1150.45320)
Shen, Zhonghua A note on amicable numbers and perfect numbers. (Chinese. English summary) Zbl 1125.11003 J. Nat. Sci. Heilongjiang Univ. 23, No. 2, 250-252, 256 (2006). MSC: 11A25 PDFBibTeX XMLCite \textit{Z. Shen}, J. Nat. Sci. Heilongjiang Univ. 23, No. 2, 250--252, 256 (2006; Zbl 1125.11003)
Chen, Ning Oscillation and asymptotic behavior of solutions for the higher order nonlinear delay difference equations. (Chinese. English summary) Zbl 1105.39002 J. Nat. Sci. Heilongjiang Univ. 23, No. 4, 532-535 (2006). MSC: 39A11 PDFBibTeX XMLCite \textit{N. Chen}, J. Nat. Sci. Heilongjiang Univ. 23, No. 4, 532--535 (2006; Zbl 1105.39002)
Cui, Shuli; Xu, Zhiting Forced oscillation for boundary value problem of a class of impulsive delay parabolic differential system. (Chinese. English summary) Zbl 1111.35330 J. Nat. Sci. Heilongjiang Univ. 23, No. 4, 474-478 (2006). MSC: 35R12 35R45 35B05 PDFBibTeX XMLCite \textit{S. Cui} and \textit{Z. Xu}, J. Nat. Sci. Heilongjiang Univ. 23, No. 4, 474--478 (2006; Zbl 1111.35330)
Hou, Chengmin; He, Yansheng Existence of nonoscillation solutions of 2-D discrete logistic equation. (English) Zbl 1117.39003 J. Nat. Sci. Heilongjiang Univ. 23, No. 4, 444-446 (2006). Reviewer: Qingkai Kong (DeKalb) MSC: 39A11 39A12 39A20 PDFBibTeX XMLCite \textit{C. Hou} and \textit{Y. He}, J. Nat. Sci. Heilongjiang Univ. 23, No. 4, 444--446 (2006; Zbl 1117.39003)
Zhang, Jianguo; Hou, Yanhong; Zou, Jietao Oscillation of second order neutral difference equations with multi-delay arguments. (Chinese. English summary) Zbl 1107.39020 J. Nat. Sci. Heilongjiang Univ. 23, No. 4, 441-443 (2006). MSC: 39A11 39A12 34K40 PDFBibTeX XMLCite \textit{J. Zhang} et al., J. Nat. Sci. Heilongjiang Univ. 23, No. 4, 441--443 (2006; Zbl 1107.39020)