Edit Profile (opens in new tab) Kong, Qingkai Compute Distance To: Compute Author ID: kong.qingkai Published as: Kong, Qingkai; Kong, Q.; Kong, Qing Kai more...less Homepage: http://www.math.niu.edu/faculty/index.php?cmd=detail&id=32 External Links: MGP · Google Scholar Documents Indexed: 155 Publications since 1983, including 3 Books Reviewing Activity: 144 Reviews Biographic References: 1 Publication Co-Authors: 47 Co-Authors with 129 Joint Publications 1,414 Co-Co-Authors all top 5 Co-Authors 21 single-authored 41 Kong, Lingju 25 Zettl, Anton 17 Graef, John R. 17 Wang, Min 17 Wu, Hongyou 12 Erbe, Lynn Harry 8 Dhar, Sougata 7 Hassan, Taher S. 6 Zhang, Binggen 4 St. George, Thomas E. 4 Wong, James S. W. 3 Wang, Jing 3 Wang, Qiru 2 Cao, Xifang 2 Chamberlain, Jeremy 2 Del Medico, Amy 2 Freedman, Herbert Irving 2 Pašić, Mervan 2 Wang, Xiaofei 2 Yang, Bo 1 Bailey, Paul B. 1 Bainov, Drumi Dimitrov 1 Bayen, Alexandre M. 1 Bellout, Hamid 1 Billingham, John 1 Binggen, Zhang 1 Chen, Xiangyong 1 Chen, Zongjie 1 Eastham, Michael S. P. 1 Everitt, William Norrie 1 Fang, Ting 1 Haertzen, Kevin 1 Harris, Bernard J. 1 Kelly, Jessica Stewart 1 King, Andrew C. 1 Kwong, Man Kam 1 Li, Fei 1 Li, Ziwei 1 Liao, Xiao Xin 1 Lin, Qun 1 Liu, Yuan 1 Liu, Yufan 1 McCabe, Michael 1 Minchev, Emil 1 Möller, Manfred 1 Piao, Daxiong 1 Ruan, Shigui 1 Shi, Yuming 1 Siauw, Timmy 1 Sun, Huaqing 1 Sun, Yijun 1 Sun, Yuangong 1 Tang, Shengdao 1 Volkmer, Hans 1 Wang, Xuelian 1 Yang, Chengyu 1 Zafer, Ağacık 1 Zhang, Shaoyan 1 Zhang, Yigang 1 Zheng, Zhaowen 1 Zhu, Zhiqiang all top 5 Serials 9 Journal of Mathematical Analysis and Applications 8 Nonlinear Analysis. Theory, Methods & Applications. Series A: Theory and Methods 7 Electronic Journal of Qualitative Theory of Differential Equations 6 Applied Mathematics and Computation 6 Mathematische Nachrichten 6 Dynamic Systems and Applications 5 Computers & Mathematics with Applications 5 Journal of Differential Equations 5 Results in Mathematics 4 Proceedings of the Royal Society of Edinburgh. Section A. Mathematics 4 Electronic Journal of Differential Equations (EJDE) 4 Communications in Applied Analysis 3 Applicable Analysis 3 Rocky Mountain Journal of Mathematics 3 Journal of Computational and Applied Mathematics 3 Proceedings of the American Mathematical Society 3 Journal of Difference Equations and Applications 3 Differential Equations and Applications 2 Canadian Journal of Mathematics 2 Transactions of the American Mathematical Society 2 Chinese Annals of Mathematics. Series B 2 Journal of Shandong College of Oceanology 2 Applied Mathematics Letters 2 Journal of Ocean University of Qingdao 2 Discrete and Continuous Dynamical Systems 2 Dynamics of Continuous, Discrete & Impulsive Systems. Series A. Mathematical Analysis 2 Journal of Applied Analysis and Computation 2 Nonlinear Analysis. Theory, Methods & Applications 1 Indian Journal of Pure & Applied Mathematics 1 Mathematical Methods in the Applied Sciences 1 Mathematical Proceedings of the Cambridge Philosophical Society 1 Annali di Matematica Pura ed Applicata. Serie Quarta 1 Canadian Mathematical Bulletin 1 Funkcialaj Ekvacioj. Serio Internacia 1 Hiroshima Mathematical Journal 1 Journal of the Korean Mathematical Society 1 Mathematika 1 Proceedings of the Edinburgh Mathematical Society. Series II 1 Utilitas Mathematica 1 Annals of Differential Equations 1 Differential and Integral Equations 1 Panamerican Mathematical Journal 1 Linear Algebra and its Applications 1 SIAM Journal on Mathematical Analysis 1 The Canadian Applied Mathematics Quarterly 1 Far East Journal of Mathematical Sciences 1 Opuscula Mathematica 1 Nonlinear Studies 1 Communications on Applied Nonlinear Analysis 1 Functional Differential Equations 1 Differential Equations and Dynamical Systems 1 Journal of Inequalities and Applications 1 Mathematical Inequalities & Applications 1 Fractional Calculus & Applied Analysis 1 Proceedings of the Royal Society of London. Series A. Mathematical, Physical and Engineering Sciences 1 Discrete Dynamics in Nature and Society 1 Mathematical Modelling and Analysis 1 Acta Mathematica Scientia. Series B. (English Edition) 1 Nonlinear Dynamics and Systems Theory 1 Cubo Matemática Educacional 1 Mediterranean Journal of Mathematics 1 Pure and Applied Mathematics, Marcel Dekker 1 Journal of Fractional Calculus and Applications 1 Fractional Differential Calculus 1 Universitext all top 5 Fields 137 Ordinary differential equations (34-XX) 19 Difference and functional equations (39-XX) 19 Operator theory (47-XX) 7 Real functions (26-XX) 6 Biology and other natural sciences (92-XX) 5 Systems theory; control (93-XX) 4 Integral equations (45-XX) 3 Global analysis, analysis on manifolds (58-XX) 2 Linear and multilinear algebra; matrix theory (15-XX) 2 Partial differential equations (35-XX) 2 Dynamical systems and ergodic theory (37-XX) 2 Functional analysis (46-XX) 2 Numerical analysis (65-XX) 1 Functions of a complex variable (30-XX) 1 Probability theory and stochastic processes (60-XX) 1 Computer science (68-XX) 1 Mechanics of deformable solids (74-XX) Publications by Year all cited Publications top 5 cited Publications Citations contained in zbMATH Open 127 Publications have been cited 1,347 times in 861 Documents Cited by ▼ Year ▼ Oscillation theory for functional differential equations. Zbl 0821.34067Erbe, L. H.; Kong, Qingkai; Zhang, B. G. 146 1994 Interval criteria for oscillation of second-order linear ordinary differential equations. Zbl 0924.34026Kong, Qingkai 82 1999 Eigenvalues of regular Sturm-Liouville problems. Zbl 0862.34020Kong, Q.; Zettl, A. 59 1996 Dependence of the \(n\)th Sturm-Liouville eigenvalue on the problem. Zbl 0932.34081Kong, Qingkai; Wu, Hongyou; Zettl, Anton 59 1999 Kamenev type theorems for second order matrix differential systems. Zbl 0777.34024Erbe, Lynn H.; Kong, Qingkai; Ruan, Shigui 56 1993 Uniqueness of positive solutions of fractional boundary value problems with non-homogeneous integral boundary conditions. Zbl 1279.34007Graef, John R.; Kong, Lingju; Kong, Qingkai; Wang, Min 40 2012 Boundary value problems for singular second-order functional differential equations. Zbl 0816.34046Erbe, L. H.; Kong, Qingkai 34 1994 Sturm-Liouville problems with finite spectrum. Zbl 1001.34019Kong, Q.; Wu, H.; Zettl, A. 31 2001 Left-definite Sturm-Liouville problems. Zbl 1002.34016Kong, Q.; Wu, H.; Zettl, A. 29 2001 Multi-point boundary value problems of second-order differential equations. I. Zbl 1066.34012Kong, Lingju; Kong, Qingkai 27 2004 Matrix representations of Sturm-Liouville problems with finite spectrum. Zbl 1185.34032Kong, Qingkai; Volkmer, Hans; Zettl, Anton 27 2009 Inequalities among eigenvalues of Sturm-Liouville problems. Zbl 0927.34017Eastham, M. S. P.; Kong, Q.; Wu, H.; Zettl, A. 25 1999 Dependence of eigenvalues of Sturm-Liouville problems on the boundary. Zbl 0856.34027Kong, Q.; Zettl, A. 23 1996 Geometric aspects of Sturm-Liouville problems. I: Structures on spaces of boundary conditions. Zbl 0957.34024Kong, Q.; Wu, H.; Zettl, A. 23 2000 Dependence of eigenvalues on the problem. Zbl 0888.34017Kong, Q.; Wu, H.; Zettl, A. 23 1997 Kamenev-type and interval oscillation criteria for second-order linear differential equations on a measure chain. Zbl 1056.34050Del Medico, Amy; Kong, Qingkai 23 2004 Indefinite Sturm-Liouville problems. Zbl 1056.34038Kong, Q.; Wu, H.; Zettl, A.; Möller, M. 20 2003 Existence and nonexistence of solutions of second-order nonlinear boundary value problems. Zbl 1119.34024Kong, Qingkai 19 2007 Second-order boundary value problems with nonhomogeneous boundary conditions. I. Zbl 1060.34005Kong, Lingju; Kong, Qingkai 19 2005 Sturm-Liouville problems on time scales with separated boundary conditions. Zbl 1153.39022Kong, Qingkai 18 2008 Second-order boundary value problems with nonhomogeneous boundary conditions. II. Zbl 1119.34009Kong, Lingju; Kong, Qingkai 17 2007 Singular left-definite Sturm–Liouville problems. Zbl 1058.34029Kong, Q.; Wu, H.; Zettl, A. 17 2004 Positive solutions of boundary value problems for third-order functional difference equations. Zbl 1057.39014Kong, Lingju; Kong, Qingkai; Zhang, Binggen 16 2002 Higher order boundary value problems with nonhomogeneous boundary conditions. Zbl 1191.34032Kong, Lingju; Kong, Qingkai 15 2010 Symmetric positive solutions of nonlinear boundary value problems. Zbl 1117.34024Graef, John R.; Kong, Lingju; Kong, Qingkai 14 2007 Fractional boundary value problems with integral boundary conditions. Zbl 1385.34010Graef, John R.; Kong, Lingju; Kong, Qingkai; Wang, Min 14 2013 On the oscillation of differential equations with an oscillatory coefficient. Zbl 0829.34025Harris, B. J.; Kong, Q. 13 1995 New Kamenev-type oscillation criteria for second-order differential equations on a measure chain. Zbl 1085.39014Del Medico, A.; Kong, Qingkai 13 2005 Positive solutions of higher-order boundary-value problems. Zbl 1084.34023Kong, Lingju; Kong, Qingkai 13 2005 Friedrichs extensions for singular Hamiltonian operators with intermediate deficiency indices. Zbl 1385.45005Zheng, Zhaowen; Kong, Qingkai 13 2018 Fractional boundary value problems and Lyapunov-type inequalities with fractional integral boundary conditions. Zbl 1363.34005Dhar, Sougata; Kong, Qingkai; McCabe, Michael 13 2016 Liapunov-type inequalities for third-order half-linear equations and applications to boundary value problems. Zbl 1309.34026Dhar, Sougata; Kong, Qingkai 12 2014 Limits of Sturm-Liouville eigenvalues when the interval shrinks to an end point. Zbl 1160.34022Kong, Qingkai; Wu, Hongyou; Zettl, Anton 11 2008 Nodal solutions of multi-point boundary value problems. Zbl 1195.34028Kong, Lingju; Kong, Qingkai; Wong, James S. W. 11 2010 Linear ordinary differential equations. Zbl 0886.34007Kong, Q.; Zettl, Anton 10 1994 Positive solutions to a fourth order boundary value problem. Zbl 1218.34024Graef, John R.; Kong, Lingju; Kong, Qingkai; Yang, Bo 10 2011 Regular approximations of singular Sturm-Liouville problems with limit-circle endpoints. Zbl 1088.34018Kong, L.; Kong, Q.; Wu, H.; Zettl, A. 10 2004 Inverse Sturm-Liouville problems with finite spectrum. Zbl 1232.34023Kong, Qingkai; Zettl, Anton 10 2012 Interval criteria for forced oscillation with nonlinearities given by Riemann-Stieltjes integrals. Zbl 1228.34055Sun, Yuangong; Kong, Qingkai 10 2011 Positive solutions of even order system periodic boundary value problems. Zbl 1195.34036Kong, Qingkai; Wang, Min 9 2010 Sturm-Liouville problems whose leading coefficient function changes sign. Zbl 1055.34051Cao, Xifang; Kong, Qingkai; Wu, Hongyou; Zettl, Anton 9 2003 Lyapunov-type inequalities for higher order half-linear differential equations. Zbl 1410.34102Dhar, Sougata; Kong, Qingkai 9 2016 Geometric aspects of Sturm-Liouville problems. III. Level surfaces of the \(n\)th eigenvalue. Zbl 1133.34019Cao, Xifang; Kong, Qingkai; Wu, Hongyou; Zettl, Anton 8 2007 Higher order multi-point boundary value problems. Zbl 1222.34019Graef, John R.; Kong, Lingju; Kong, Qingkai 8 2011 The study of Jacobi and cyclic Jacobi matrix eigenvalue problems using Sturm-Liouville theory. Zbl 1210.15011Kong, Qingkai; Zettl, Anton 8 2011 Lyapunov-type inequalities for third-order linear differential equations. Zbl 1345.34029Dhar, Sougata; Kong, Qingkai 8 2016 Existence and uniqueness of solutions for a fractional boundary value problem with Dirichlet boundary condition. Zbl 1340.34015Graef, John; Kong, Lingju; Kong, Qingkai; Wang, Min 8 2013 Nonoscillation of a class of neutral differential equations. Zbl 1045.34042Kong, Qingkai; Sun, Yijun; Zhang, Binggen 7 2002 Nodal solutions of second order nonlinear boundary value problems. Zbl 1189.34043Kong, Lingju; Kong, Qingkai 7 2009 Nodal solutions of boundary value problems with boundary conditions involving Riemann-Stieltjes integrals. Zbl 1220.34027Chamberlain, Jeremy; Kong, Lingju; Kong, Qingkai 7 2011 Oscillation for systems of functional differential equations. Zbl 0863.34072Kong, Qingkai 6 1996 Inequalities among eigenvalues of singular Sturm-Liouville problems. Zbl 0942.34020Kong, Q.; Wu, H.; Zettl, A. 6 1999 Geometric aspects of Sturm-Liouville problems. II: Space of boundary conditions for left-definiteness. Zbl 1056.34037Haertzen, Kevin; Kong, Qingkai; Wu, Hongyou; Zettl, Anton 6 2004 Oscillation and nonoscillation properties of neutral differential equations. Zbl 0797.34072Erbe, L. H.; Kong, Qingkai 6 1994 Dissipation, boundedness and persistence of general ecological systems. Zbl 0837.92025Kong, Qingkai; Liao, Xiaoxin 5 1995 Stieltjes integral inequalities of Gronwall type and applications. Zbl 0736.26007Erbe, L. H.; Kong, Qing Kai 5 1990 Multiple solutions of systems of fractional boundary value problems. Zbl 1323.34007Graef, John R.; Kong, Lingju; Kong, Qingkai 5 2015 Even order nonlinear eigenvalue problems on a measure chain. Zbl 1024.34021Kong, Lingju; Kong, Qingkai 5 2003 Oscillation results for second order neutral differential equations. Zbl 0787.34057Erbe, L. H.; Kong, Q. 5 1992 Oscillations in delay differential systems. Zbl 0780.34049Kong, Qingkai; Freedman, H. I. 5 1993 Oscillation of partial differential equations with deviating arguments. Zbl 0799.35214Erbe, L. H.; Kong, Q.; Zhang, B. G. 5 1993 Oscillation criteria for second order half-linear differential equations. Zbl 0924.34025Kong, Qingkai 5 1999 Multiplicity of Sturm–Liouville eigenvalues. Zbl 1069.34124Kong, Q.; Wu, H.; Zettl, A. 5 2004 A short course in ordinary differential equations. Zbl 1326.34007Kong, Qingkai 5 2014 Interval criteria for forced oscillation of differential equations with \(p\)-Laplacian, damping, and mixed nonlinearities. Zbl 1251.34050Hassan, Taher S.; Kong, Qingkai 5 2011 Interval criteria for forced oscillation of differential equations with \(p\)-Laplacian and nonlinearities given by Riemann-Stieltjes integrals. Zbl 1258.34065Hassan, Taher S.; Kong, Qingkai 5 2012 Essential spectrum of singular discrete linear Hamiltonian systems. Zbl 1353.39008Sun, Huaqing; Kong, Qingkai; Shi, Yuming 5 2016 Application of the mixed monotone operator method to fractional boundary value problems. Zbl 1412.34086Graef, John R.; Kong, Lingju; Kong, Qingkai 5 2012 Linear Sturm-Liouville problems with multi-point boundary conditions. Zbl 1286.34048Kong, Lingju; Kong, Qingkai; Kwong, Man K.; Wong, James S. W. 5 2013 Positive solutions of nonlinear fractional boundary value problems with Dirichlet boundary conditions. Zbl 1340.34020Kong, Qingkai; Wang, Min 5 2012 Observer-based \(\mathcal{H}_\infty\) control for persistent dwell-time switched networked nonlinear systems under packet dropout. Zbl 07428242Chen, Zongjie; Zhang, Yigang; Kong, Qingkai; Fang, Ting; Wang, Jing 5 2022 Interval oscillation conditions for difference equations. Zbl 0828.39002Kong, Q.; Zettl, A. 4 1995 Oscillatory and asymptotic behavior of a discrete logistic model. Zbl 0836.39004Kong, Q. 4 1995 Multi-point boundary value problems of second-order differential equations. II. Zbl 1140.34008Kong, Lingju; Kong, Qingkai 4 2007 A telescoping principle for oscillation of second order differential equations on a time scale. Zbl 1156.34021Erbe, Lynn; Kong, Lingju; Kong, Qingkai 4 2006 Oscillation of second order matrix differential systems. Zbl 0993.34034Kong, Qingkai 4 2000 Positive solutions of nonlocal fractional boundary value problems. Zbl 1310.34006Graef, John R.; Kong, Lingju; Kong, Qingkai; Wang, Min 4 2013 Asymptotic and oscillatory behavior of \(n\)th-order half-linear dynamic equations. Zbl 1310.34123Hassan, Taher S.; Kong, Qingkai 4 2014 Explicit conditions for oscillation of neutral differential systems. Zbl 0811.34053Erbe, L.; Kong, Qingkai 4 1994 Second-order differential equations: some significant results due to James S.W. Wong. Zbl 1294.34038Kong, Qingkai; Pašić, Mervan 4 2014 Positive solutions of even order periodic boundary value problems. Zbl 1238.34045Kong, Qingkai; Wang, Min 4 2011 Using time scales to study multi-interval Sturm-Liouville problems with interface conditions. Zbl 1263.34032Kong, Qingkai; Wang, Qi-Ru 4 2013 On a generalized discrete beam equation via variational methods. Zbl 1278.39005Graef, John R.; Kong, Lingju; Kong, Qingkai 4 2012 Lyapunov-type inequalities for odd order linear differential equations. Zbl 1358.34032Dhar, Sougata; Kong, Qingkai 4 2016 Right-definite half-linear Sturm-Liouville problems. Zbl 1131.34020Kong, Lingju; Kong, Qingkai 3 2007 Existence of nodal solutions of multi-point boundary value problems. Zbl 1236.34027Kong, Lingju; Kong, Qingkai 3 2009 Positive solutions of nonlinear \(m\)-point boundary value problems on a measure chain. Zbl 1037.34015Kong, Lingju; Kong, Qingkai 3 2003 Lyapunov-type inequalities for \(\alpha\)-th order fractional differential equations with \(2<\alpha\leq 3\) and fractional boundary conditions. Zbl 1370.34012Dhar, Sougata; Kong, Qingkai 3 2017 Nonoscillation and oscillation of second order half-linear differential equations. Zbl 1123.34027Kong, Qingkai 3 2007 Nodal solutions of nonlocal boundary value problems. Zbl 1193.34032Chamberlain, J.; Kong, Lingju; Kong, Qingkai 3 2009 Eigenvalue approach to even order system periodic boundary value problems. Zbl 1267.34048Kong, Qingkai; Wang, Min 3 2013 Oscillation of a forced second order differential equation with a deviating argument. Zbl 1234.34043Kong, Qingkai; Wong, James S. W. 3 2010 Nonlinear initial value problems with \(p\)-Laplacian. Zbl 1213.34013Kong, Qingkai; Wang, Xiaofei 2 2010 Oscillation of a forced second order nonlinear equation. Zbl 0798.34042Kong, Qingkai; Binggen, Zhang 2 1994 Some necessary and sufficient conditions for oscillation of neutral differential equations. Zbl 0872.34046Erbe, L.; Kong, Qingkai 2 1996 A new proof of the inequalities among Sturm-Liouville eigenvalues. Zbl 0974.34024Kong, Qingkai; Lin, Qun; Wu, Hongyou; Zettl, Anton 2 2000 Existence of three solutions for a higher-order boundary-value problem. Zbl 1173.34014Graef, John R.; Kong, Lingju; Kong, Qingkai 2 2009 Asymptotic behavior of a class of nonlinear differential equations of n- th order. Zbl 0675.34008Kong, Qingkai 2 1988 Oscillation criteria for second order nonlinear dynamic equations with \(p\)-Laplacian and damping. Zbl 1299.34295Hassan, Taher S.; Kong, Qingkai 2 2013 Dependence of the unique solution of a periodic boundary value problem on the parameter. Zbl 1228.34030Bellout, Hamid; Kong, Qingkai; Wang, Min 2 2011 Observer-based \(\mathcal{H}_\infty\) control for persistent dwell-time switched networked nonlinear systems under packet dropout. Zbl 07428242Chen, Zongjie; Zhang, Yigang; Kong, Qingkai; Fang, Ting; Wang, Jing 5 2022 Asynchronous fault-tolerant control for stochastic jumping singularly perturbed systems: an \(H_\infty\) sliding mode control scheme. Zbl 07329302Yang, Chengyu; Li, Fei; Kong, Qingkai; Chen, Xiangyong; Wang, Jian 1 2021 Extended dissipative sliding mode control for nonlinear networked control systems via event-triggered mechanism with random uncertain measurement. Zbl 07422810Liu, Yu-An; Tang, Shengdao; Liu, Yufan; Kong, Qingkai; Wang, Jing 1 2021 Lower bounds for the eigenvalues of first-order nonlinear Hamiltonian systems on time scales. Zbl 1408.34073Kong, Qingkai; Zafer, Ağacık 1 2019 Friedrichs extensions for singular Hamiltonian operators with intermediate deficiency indices. Zbl 1385.45005Zheng, Zhaowen; Kong, Qingkai 13 2018 Linear Sturm-Liouville problems with Riemann-Stieltjes integral boundary conditions. Zbl 06963044Kong, Qingkai; St. George, Thomas E. 1 2018 Lyapunov-type inequalities for \(\alpha\)-th order fractional differential equations with \(2<\alpha\leq 3\) and fractional boundary conditions. Zbl 1370.34012Dhar, Sougata; Kong, Qingkai 3 2017 Oscillation criteria for higher-order nonlinear dynamic equations with Laplacians and a deviating argument on time scales. Zbl 1370.34148Hassan, Taher S.; Kong, Qingkai 2 2017 On a fractional boundary value problem with a perturbation term. Zbl 1474.34169Graef, John R.; Kong, Lingju; Kong, Qingkai; Wang, Min 2 2017 Fractional boundary value problems and Lyapunov-type inequalities with fractional integral boundary conditions. Zbl 1363.34005Dhar, Sougata; Kong, Qingkai; McCabe, Michael 13 2016 Lyapunov-type inequalities for higher order half-linear differential equations. Zbl 1410.34102Dhar, Sougata; Kong, Qingkai 9 2016 Lyapunov-type inequalities for third-order linear differential equations. Zbl 1345.34029Dhar, Sougata; Kong, Qingkai 8 2016 Essential spectrum of singular discrete linear Hamiltonian systems. Zbl 1353.39008Sun, Huaqing; Kong, Qingkai; Shi, Yuming 5 2016 Lyapunov-type inequalities for odd order linear differential equations. Zbl 1358.34032Dhar, Sougata; Kong, Qingkai 4 2016 Asymptotics and oscillation of \(n\)th-order nonlinear dynamic equations on time scales. Zbl 1410.34273Zhang, Shao-Yan; Wang, Qi-Ru; Kong, Qingkai 2 2016 Linear Sturm-Liouville problems with general homogeneous linear multi-point boundary conditions. Zbl 1357.34046Kong, Qingkai; George, Thomas E. St. 1 2016 Multiple solutions of systems of fractional boundary value problems. Zbl 1323.34007Graef, John R.; Kong, Lingju; Kong, Qingkai 5 2015 Liapunov-type inequalities for third-order half-linear equations and applications to boundary value problems. Zbl 1309.34026Dhar, Sougata; Kong, Qingkai 12 2014 A short course in ordinary differential equations. Zbl 1326.34007Kong, Qingkai 5 2014 Asymptotic and oscillatory behavior of \(n\)th-order half-linear dynamic equations. Zbl 1310.34123Hassan, Taher S.; Kong, Qingkai 4 2014 Second-order differential equations: some significant results due to James S.W. Wong. Zbl 1294.34038Kong, Qingkai; Pašić, Mervan 4 2014 Existence and uniqueness of solutions for a fractional boundary value problem with a separated boundary condition. Zbl 1310.34008Kong, Lingju; Kong, Qingkai; Wang, Min 1 2014 Existence of Nodal solutions of boundary value problems with two multi-point boundary conditions. Zbl 1312.34052Kong, Qingkai; George, Thomas E. St. 1 2014 Fractional boundary value problems with integral boundary conditions. Zbl 1385.34010Graef, John R.; Kong, Lingju; Kong, Qingkai; Wang, Min 14 2013 Existence and uniqueness of solutions for a fractional boundary value problem with Dirichlet boundary condition. Zbl 1340.34015Graef, John; Kong, Lingju; Kong, Qingkai; Wang, Min 8 2013 Linear Sturm-Liouville problems with multi-point boundary conditions. Zbl 1286.34048Kong, Lingju; Kong, Qingkai; Kwong, Man K.; Wong, James S. W. 5 2013 Positive solutions of nonlocal fractional boundary value problems. Zbl 1310.34006Graef, John R.; Kong, Lingju; Kong, Qingkai; Wang, Min 4 2013 Using time scales to study multi-interval Sturm-Liouville problems with interface conditions. Zbl 1263.34032Kong, Qingkai; Wang, Qi-Ru 4 2013 Eigenvalue approach to even order system periodic boundary value problems. Zbl 1267.34048Kong, Qingkai; Wang, Min 3 2013 Oscillation criteria for second order nonlinear dynamic equations with \(p\)-Laplacian and damping. Zbl 1299.34295Hassan, Taher S.; Kong, Qingkai 2 2013 Uniqueness and parameter dependence of positive solutions to higher order boundary value problems with fractional Q-derivatives. Zbl 1286.34009Graef, John R.; Kong, Lingju; Kong, Qingkai; Wang, Min 2 2013 Infinitely many solutions for a discrete fourth order boundary value problem. Zbl 1307.39002Graef, J. R.; Kong, L.; Kong, Q. 1 2013 Matching method for nodal solutions of multi-point boundary value problems. Zbl 1279.34033Kong, Qingkai; George, Thomas E. St. 1 2013 Uniqueness of positive solutions of fractional boundary value problems with non-homogeneous integral boundary conditions. Zbl 1279.34007Graef, John R.; Kong, Lingju; Kong, Qingkai; Wang, Min 40 2012 Inverse Sturm-Liouville problems with finite spectrum. Zbl 1232.34023Kong, Qingkai; Zettl, Anton 10 2012 Interval criteria for forced oscillation of differential equations with \(p\)-Laplacian and nonlinearities given by Riemann-Stieltjes integrals. Zbl 1258.34065Hassan, Taher S.; Kong, Qingkai 5 2012 Application of the mixed monotone operator method to fractional boundary value problems. Zbl 1412.34086Graef, John R.; Kong, Lingju; Kong, Qingkai 5 2012 Positive solutions of nonlinear fractional boundary value problems with Dirichlet boundary conditions. Zbl 1340.34020Kong, Qingkai; Wang, Min 5 2012 On a generalized discrete beam equation via variational methods. Zbl 1278.39005Graef, John R.; Kong, Lingju; Kong, Qingkai 4 2012 Oscillation of forced impulsive differential equations with \(p\)-Laplacian and nonlinearities given by Riemann-Stieltjes integrals. Zbl 1340.34128Hassan, T.; Kong, Qingkai 2 2012 Positive solutions to a fourth order boundary value problem. Zbl 1218.34024Graef, John R.; Kong, Lingju; Kong, Qingkai; Yang, Bo 10 2011 Interval criteria for forced oscillation with nonlinearities given by Riemann-Stieltjes integrals. Zbl 1228.34055Sun, Yuangong; Kong, Qingkai 10 2011 Higher order multi-point boundary value problems. Zbl 1222.34019Graef, John R.; Kong, Lingju; Kong, Qingkai 8 2011 The study of Jacobi and cyclic Jacobi matrix eigenvalue problems using Sturm-Liouville theory. Zbl 1210.15011Kong, Qingkai; Zettl, Anton 8 2011 Nodal solutions of boundary value problems with boundary conditions involving Riemann-Stieltjes integrals. Zbl 1220.34027Chamberlain, Jeremy; Kong, Lingju; Kong, Qingkai 7 2011 Interval criteria for forced oscillation of differential equations with \(p\)-Laplacian, damping, and mixed nonlinearities. Zbl 1251.34050Hassan, Taher S.; Kong, Qingkai 5 2011 Positive solutions of even order periodic boundary value problems. Zbl 1238.34045Kong, Qingkai; Wang, Min 4 2011 Dependence of the unique solution of a periodic boundary value problem on the parameter. Zbl 1228.34030Bellout, Hamid; Kong, Qingkai; Wang, Min 2 2011 Higher order boundary value problems with two point separated nonhomogeneous boundary conditions. Zbl 1242.34037Graef, John R.; Kong, Lingju; Kong, Qingkai; Yang, Bo 1 2011 Nonlinear boundary value problems with \(p\)-Laplacian. Zbl 1242.34032Kong, Qingkai; Wang, Xiaofei 1 2011 Higher order boundary value problems with nonhomogeneous boundary conditions. Zbl 1191.34032Kong, Lingju; Kong, Qingkai 15 2010 Nodal solutions of multi-point boundary value problems. Zbl 1195.34028Kong, Lingju; Kong, Qingkai; Wong, James S. W. 11 2010 Positive solutions of even order system periodic boundary value problems. Zbl 1195.34036Kong, Qingkai; Wang, Min 9 2010 Oscillation of a forced second order differential equation with a deviating argument. Zbl 1234.34043Kong, Qingkai; Wong, James S. W. 3 2010 Nonlinear initial value problems with \(p\)-Laplacian. Zbl 1213.34013Kong, Qingkai; Wang, Xiaofei 2 2010 Higher order multi-point boundary value problems with sign-changing nonlinearities and nonhomogeneous boundary conditions. Zbl 1211.34014Graef, J. R.; Kong, Lingju; Kong, Qingkai; Wong, James S. W. 1 2010 Positive solutions of boundary value problems with \(p\)-Laplacian. Zbl 1203.34042Kong, Qingkai; Wang, Min 1 2010 Matrix representations of Sturm-Liouville problems with finite spectrum. Zbl 1185.34032Kong, Qingkai; Volkmer, Hans; Zettl, Anton 27 2009 Nodal solutions of second order nonlinear boundary value problems. Zbl 1189.34043Kong, Lingju; Kong, Qingkai 7 2009 Existence of nodal solutions of multi-point boundary value problems. Zbl 1236.34027Kong, Lingju; Kong, Qingkai 3 2009 Nodal solutions of nonlocal boundary value problems. Zbl 1193.34032Chamberlain, J.; Kong, Lingju; Kong, Qingkai 3 2009 Existence of three solutions for a higher-order boundary-value problem. Zbl 1173.34014Graef, John R.; Kong, Lingju; Kong, Qingkai 2 2009 Uniqueness and parameter dependence of solutions of second-order boundary value problems. Zbl 1181.34021Kong, Lingju; Kong, Qingkai 1 2009 Kamenev-type oscillation criteria for second-order matrix dynamic equations on time scales. Zbl 1184.34092Kong, Qingkai; Wang, Qi-Ru; Zhu, Zhi-Qiang 1 2009 Sturm-Liouville problems on time scales with separated boundary conditions. Zbl 1153.39022Kong, Qingkai 18 2008 Limits of Sturm-Liouville eigenvalues when the interval shrinks to an end point. Zbl 1160.34022Kong, Qingkai; Wu, Hongyou; Zettl, Anton 11 2008 Existence and nonexistence of solutions of second-order nonlinear boundary value problems. Zbl 1119.34024Kong, Qingkai 19 2007 Second-order boundary value problems with nonhomogeneous boundary conditions. II. Zbl 1119.34009Kong, Lingju; Kong, Qingkai 17 2007 Symmetric positive solutions of nonlinear boundary value problems. Zbl 1117.34024Graef, John R.; Kong, Lingju; Kong, Qingkai 14 2007 Geometric aspects of Sturm-Liouville problems. III. Level surfaces of the \(n\)th eigenvalue. Zbl 1133.34019Cao, Xifang; Kong, Qingkai; Wu, Hongyou; Zettl, Anton 8 2007 Multi-point boundary value problems of second-order differential equations. II. Zbl 1140.34008Kong, Lingju; Kong, Qingkai 4 2007 Right-definite half-linear Sturm-Liouville problems. Zbl 1131.34020Kong, Lingju; Kong, Qingkai 3 2007 Nonoscillation and oscillation of second order half-linear differential equations. Zbl 1123.34027Kong, Qingkai 3 2007 A telescoping principle for oscillation of second order differential equations on a time scale. Zbl 1156.34021Erbe, Lynn; Kong, Lingju; Kong, Qingkai 4 2006 Second-order boundary value problems with nonhomogeneous boundary conditions. I. Zbl 1060.34005Kong, Lingju; Kong, Qingkai 19 2005 New Kamenev-type oscillation criteria for second-order differential equations on a measure chain. Zbl 1085.39014Del Medico, A.; Kong, Qingkai 13 2005 Positive solutions of higher-order boundary-value problems. Zbl 1084.34023Kong, Lingju; Kong, Qingkai 13 2005 Multi-point boundary value problems of second-order differential equations. I. Zbl 1066.34012Kong, Lingju; Kong, Qingkai 27 2004 Kamenev-type and interval oscillation criteria for second-order linear differential equations on a measure chain. Zbl 1056.34050Del Medico, Amy; Kong, Qingkai 23 2004 Singular left-definite Sturm–Liouville problems. Zbl 1058.34029Kong, Q.; Wu, H.; Zettl, A. 17 2004 Regular approximations of singular Sturm-Liouville problems with limit-circle endpoints. Zbl 1088.34018Kong, L.; Kong, Q.; Wu, H.; Zettl, A. 10 2004 Geometric aspects of Sturm-Liouville problems. II: Space of boundary conditions for left-definiteness. Zbl 1056.34037Haertzen, Kevin; Kong, Qingkai; Wu, Hongyou; Zettl, Anton 6 2004 Multiplicity of Sturm–Liouville eigenvalues. Zbl 1069.34124Kong, Q.; Wu, H.; Zettl, A. 5 2004 A class of nonlinear boundary value problems of second-order ordinary differential equations. Zbl 1084.34513Kong, Lingju; Kong, Qingkai 1 2004 Indefinite Sturm-Liouville problems. Zbl 1056.34038Kong, Q.; Wu, H.; Zettl, A.; Möller, M. 20 2003 Sturm-Liouville problems whose leading coefficient function changes sign. Zbl 1055.34051Cao, Xifang; Kong, Qingkai; Wu, Hongyou; Zettl, Anton 9 2003 Even order nonlinear eigenvalue problems on a measure chain. Zbl 1024.34021Kong, Lingju; Kong, Qingkai 5 2003 Positive solutions of nonlinear \(m\)-point boundary value problems on a measure chain. Zbl 1037.34015Kong, Lingju; Kong, Qingkai 3 2003 On some eigenvalue problems in fuel-cell dynamics. Zbl 1056.34091Bailey, P. B.; Billingham, J.; Cooper, R. J.; Everitt, W. N.; King, A. C.; Kong, Q.; Wu, H.; Zettl, A. 2 2003 Positive solutions of boundary value problems for functional differential equations. Zbl 1036.34076Kong, Lingju; Kong, Qingkai 1 2003 Positive solutions of boundary value problems for third-order functional difference equations. Zbl 1057.39014Kong, Lingju; Kong, Qingkai; Zhang, Binggen 16 2002 Nonoscillation of a class of neutral differential equations. Zbl 1045.34042Kong, Qingkai; Sun, Yijun; Zhang, Binggen 7 2002 Multiplicities of eigenvalues of a vector-valued Sturm-Liouville problem. Zbl 1052.34032Kong, Qingkai 1 2002 Sturm-Liouville problems with finite spectrum. Zbl 1001.34019Kong, Q.; Wu, H.; Zettl, A. 31 2001 Left-definite Sturm-Liouville problems. Zbl 1002.34016Kong, Q.; Wu, H.; Zettl, A. 29 2001 Geometric aspects of Sturm-Liouville problems. I: Structures on spaces of boundary conditions. Zbl 0957.34024Kong, Q.; Wu, H.; Zettl, A. 23 2000 Oscillation of second order matrix differential systems. Zbl 0993.34034Kong, Qingkai 4 2000 A new proof of the inequalities among Sturm-Liouville eigenvalues. Zbl 0974.34024Kong, Qingkai; Lin, Qun; Wu, Hongyou; Zettl, Anton 2 2000 Interval criteria for oscillation of second-order linear ordinary differential equations. Zbl 0924.34026Kong, Qingkai 82 1999 Dependence of the \(n\)th Sturm-Liouville eigenvalue on the problem. Zbl 0932.34081Kong, Qingkai; Wu, Hongyou; Zettl, Anton 59 1999 ...and 27 more Documents all cited Publications top 5 cited Publications all top 5 Cited by 832 Authors 45 Kong, Qingkai 40 Kong, Lingju 28 Graef, John R. 27 Meng, Fanwei 25 Ao, Jijun 24 Zettl, Anton 22 Wang, Qiru 19 Sun, Jiong 18 Luca, Rodica 17 Sun, Yuangong 17 Wu, Hongyou 15 Baculíková, Blanka 15 Džurina, Jozef 15 Henderson, Johnny Lee 14 Agarwal, Ravi P. 14 Ge, Weigao 14 Shi, Yuming 13 Li, Wan-Tong 13 Xu, Zhiting 13 Zheng, Zhaowen 12 Diblík, Josef 12 Li, Tongxing 11 Ntouyas, Sotiris K. 10 Chatzarakis, George E. 10 Hassan, Taher S. 9 Ahmad, Bashir 9 O’Regan, Donal 9 Wang, Min 9 Yang, Qigui 8 Liu, Lishan 8 Ugurlu, Ekin 8 Wei, Guangsheng 8 Zhang, Maozhu 7 Behrndt, Jussi 7 Braverman, Elena 7 Grace, Said Rezk 7 Kang, Shin Min 7 Li, Kun 7 Liu, Zeqing 7 Sun, Shurong 7 Tang, Xianhua 7 Trunk, Carsten 7 Wang, Zhong 7 Wong, James S. W. 7 Zhai, Chengbo 7 Zhang, Binggen 7 Zhou, Xiaoliang 6 Benchohra, Mouffak 6 Berezansky, Leonid M. 6 Chen, Shaozhu 6 Dhar, Sougata 6 Kúdelčíková, Mária 6 Liu, Haidong 6 Qiu, Yangcong 6 Shi, Guoliang 6 Stavroulakis, Ioannis P. 6 Thandapani, Ethiraju 6 Wang, Wanyi 6 Wang, Wusheng 6 Xu, Yuantong 6 Yang, Bo 6 Zhu, Hao 5 Chanane, Bilal 5 Erbe, Lynn Harry 5 Ferreira, José Manuel 5 Gao, Chenghua 5 Gholami, Yousef 5 Han, Zhenlai 5 Jia, Mei 5 Jiang, Daqing 5 Mathsen, Ronald M. 5 Pašić, Mervan 5 Qi, Jiangang 5 Sun, Jianping 5 Sun, Yongping 5 Wu, Yonghong 5 Zhang, Meirong 5 Zhuang, Rong-Kun 4 Al-saedi, Ahmed Eid Salem 4 Bachar, Imed 4 Bai, Dingyong 4 Çakmak, Devrim 4 Cui, Yujun 4 Domoshnitsky, Alexander I. 4 Feng, Meiqiang 4 Grigoryan, Gevorg Avagovich 4 Hao, Xiaoling 4 Ji, Dehong 4 Liu, Xiping 4 Liu, Yan 4 Marletta, Marco 4 Pinelas, Sandra 4 Rath, Radhanath N. 4 Sugie, Jitsuro 4 Tudorache, Alexandru 4 Volkmer, Hans 4 Yan, Jun 4 Yan, Jurang 4 Yang, Xiaojing 4 Zhang, Chenghui ...and 732 more Authors all top 5 Cited in 159 Serials 74 Journal of Mathematical Analysis and Applications 70 Applied Mathematics and Computation 44 Advances in Difference Equations 42 Nonlinear Analysis. 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RACSAM 2 S\(\vec{\text{e}}\)MA Journal 2 Fractional Differential Calculus 2 International Journal of Analysis and Applications 2 AIMS Mathematics 1 Bulletin of the Australian Mathematical Society 1 International Journal of Engineering Science 1 International Journal of Theoretical Physics 1 Inverse Problems 1 Journal of Engineering Mathematics 1 Journal of Mathematical Biology 1 Journal of Mathematical Physics 1 Ukrainian Mathematical Journal 1 Chaos, Solitons and Fractals 1 Archiv der Mathematik 1 Archivum Mathematicum 1 Demonstratio Mathematica 1 Fuzzy Sets and Systems 1 Glasgow Mathematical Journal 1 Hiroshima Mathematical Journal 1 Journal of Approximation Theory 1 Kybernetika 1 Mathematische Annalen 1 Numerical Functional Analysis and Optimization 1 Operations Research ...and 59 more Serials all top 5 Cited in 35 Fields 746 Ordinary differential equations (34-XX) 152 Operator theory (47-XX) 89 Difference and functional equations (39-XX) 56 Partial differential equations (35-XX) 43 Real functions (26-XX) 25 Numerical analysis (65-XX) 22 Linear and multilinear algebra; matrix theory (15-XX) 22 Dynamical systems and ergodic theory (37-XX) 20 Integral equations (45-XX) 11 Global analysis, analysis on manifolds (58-XX) 11 Biology and other natural sciences (92-XX) 8 Systems theory; control (93-XX) 7 Special functions (33-XX) 6 Calculus of variations and optimal control; optimization (49-XX) 6 Probability theory and stochastic processes (60-XX) 6 Operations research, mathematical programming (90-XX) 5 Functional analysis (46-XX) 3 Approximations and expansions (41-XX) 3 Geometry (51-XX) 3 Quantum theory (81-XX) 2 Combinatorics (05-XX) 2 Measure and integration (28-XX) 2 Integral transforms, operational calculus (44-XX) 2 Fluid mechanics (76-XX) 1 Mathematical logic and foundations (03-XX) 1 Number theory (11-XX) 1 Functions of a complex variable (30-XX) 1 Differential geometry (53-XX) 1 Statistics (62-XX) 1 Mechanics of particles and systems (70-XX) 1 Mechanics of deformable solids (74-XX) 1 Statistical mechanics, structure of matter (82-XX) 1 Geophysics (86-XX) 1 Game theory, economics, finance, and other social and behavioral sciences (91-XX) 1 Information and communication theory, circuits (94-XX) Citations by Year