Kung Fu Ng's Home Page

Research Professor, Ph. D., D. Sc.(Wales)

Department of Mathematics
The Chinese University of Hong Kong
Shatin, New Territories, Hong Kong

Office :  (852) 3943 7968
Fax :     (852) 2603 5154
E-mail :  kfng@math.cuhk.edu.hk 


Research Interests

Functional Analysis and Optimization, Convex Analysis.
 


Selected Recent Publications

K. F. Ng, "An Open Mapping Theorem", Math. Proc. Camb. (old name of the Journal: Proc. Camb. Phil. Soc.), 74 (1973), 61-66. (PDF file)

C. C. Chou, K. F. Ng and J. S. Pang, "Minimizing and Stationary Sequences of Constrained Optimization Problems", SIAM Journal on Control and Optimization, 36 (1998), 1908-1936, available at epubs.siam.org.

L. R. Huang, K. F. Ng and J. P. Penot, "On Minimizing and Critical Sequences in Nonsmooth Optimization", SIAM Journal on Optimization, 10 (2000), 999-1019, available at epubs.siam.org.

K. F. Ng and X. Y. Zheng, "Global Error Bounds with Fractional Exponents", Mathematical Programming, Ser. B88 (2000), 357-370. (DVI file), available at http://www.springerlink.com/openurl.asp?genre=article&issn=0025-5610&volume=88&issue=2&spage=357.

K. F. Ng and X. Y. Zheng, "Error Bounds For Lower Semicontinuous Functions in Normed Spaces", SIAM Journal on Optimization, 12 (2001), 1-17. (DVI file), available at epubs.siam.org.

Y. R. He and K. F. Ng, "Best Approximation and Perturbation Property in Hilbert Spaces," J. Optim. Theory App., 126 (2005), No. 2, 265-285. (PS file)

K. F. Ng and X. Y. Zheng, "Existence of Efficient Points in Vector Optimization and Generalized Bishop-Phelps Theorem", J. Optim. Theory App., 115 (2002), 29-47. (DVI file), available at springerlink.metapress.com.

K. F. Ng and  X.Y. Zheng, "Error Bounds of Constrained Quadratic Functions and Piecewise Affine Inequality Systems," J. Optim. Theory App., 118 (2003), 584-607.(DVI file), available at springerlink.metapress.com.

Kung Fu Ng and Wei Hong Yang, "Error Bounds for Abstract Linear Inequality Systems", SIAM Journal on Optimization, 13 (2002), 24-43. (DVI file), available at epubs.siam.org.

Kung Fu Ng and Wei Hong Yang, "Regularities and Their Relations to Error Bounds", Math. Program. Ser. A, 99(2004), 521-538. (PDF file), available at springerlink.metapress.com.

Kung Fu Ng and Xi Yin Zheng, "Characterization of Error Bounds for Convex Multifunctions on Banach Spaces", Math. Oper. Res., 29(2004), 45-63. ( DVI file) ,  available at proquest.umi.com.

L.R. Huang and K.F. Ng, "On First and Second-Order Conditions for Error Bounds", SIAM Journal on Optimization, 14(2004), 1057-1073.(DVI file), available at epubs.siam.org.

K. F. Ng and Xi Yin Zheng, "Hoffman's Least Error Bounds for Systems of Linear Inequality", J. Global Optim., 30(2004), 391-403. (DVI file)

Chong Li and K. F. Ng, "Constraint Qualification, the Strong CHIP and Best Approximation with Convex Constraints in Banach Spaces", SIAM Journal on Optimization, 14(2003) 584-607, available at epubs.siam.org.

Chong Li and K.F. Ng, ˘On Constraint Qualification for an Infinite System of Convex Inequalities in a Banach Space? SIAM Journal on Optimization, 15(2005), No. 2, 488-512. Available at epubs.siam.org.

Xin Yi Zheng and K. F. Ng, "Error Bound Moduli for Conic Convex Systems on Banach Spaces", Math. Oper. Res., 29(2004), 213-228. Abstract available at proquest.umi.com.

Xin Yi Zheng and K. F. Ng, "Metric Regularity and Constraint Qualifications for Convex Inequalities on Banach Spaces", SIAM Journal on Optimization, 14(2004), 757-772, available at epubs.siam.org.

K. F. Ng and Wei Hong Yang, "Error Bounds for Some Convex Functions and Distance Composite Functions", SIAM Journal on Optimization, 15(2005), No. 4, 1042-1056. (DVI file)

Chong Li and K. F. Ng, "Strong CHIP for Infinite System of Closed Convex Sets in Normed Linear Spaces", SIAM Journal on Optimization, 16(2005), No. 2, 311-340. (DVI file)

Chong Li and K. F. Ng, "On Best Restricted Range Approximation in Continuous Complex-Valued Function Spaces", Journal of Approximation Theory, 136(2005), issue 2, 159-181. (DVI file)

X. Y. Zheng and K. F. Ng, "The Fermat Rule for Multifunctions in Banach Spaces", Math. Program. Ser. A, 104(2005), 69-90.(PDF file)

"Linear Regularity and f-Regularity of Nonconvex Sets", J. Math. Anal. Appl. 328(2007),257-280, (with R. Zang).

"D-Gap Functions for Nonsmooth Variational Inequality Problems", J. Optim. Theory Appl. doi 10.1007 / s10957-007-9193-1 (2007), (with L. L. Tan).

"Error Bounds of Regularized Gap Functions for Nonsmooth Variational Inequality Problems", Math. Prog. Ser. A, 110 (2007), 405-429, (with L. L. Tan).

"The Lagrange Multilizer Rule for Multifunctions in Banach Spaces", SIAM J. Optim. 17 (2006), pp. 1154 - 1175., (with X. Y. Zheng) (PDF file)

"Majoring functions and convergence of Gauss-Newton's method for convex composite optimization", SIAM J. Optim., 18 (2007), 613-642, (with C. Li) (PDF file)

"Metric subregularity and constraint qualifications for convex generalized equations in Banach spaces", SIAM J. Optim., 18 (2007), 437-460, (with X.Y. Zheng) (PDF file)

"The SECQ, linear regularity and the strong CHIP for infinite system of closed convex sets in normed linear space", SIAM J. Optim., 18 (2007), 643-665, (with C. Li and T.K. Pong) (PDF file)

"Linear regularity for a collection of subsmooth sets in Banach spaces", SIAM J. Optim., 19(2008), 62-79, (with X.Y. Zheng) (PDF file)

"Unified approach to some geometric results in variational analysis", Journal of Functional Analysis, 248 (2007), 317-343,(with G.Y. Li and X.Y. Zheng) (PDF file)

"Constraint Qualifications for Convex Inequality Systems with Applications in Constrained Optimization", SIAM J. Optim., 19(2008), 163-187, (with C. Li and T.K. Pong) (PDF file)

"On extension of Fenchel duality and its application", SIAM J. Optim., 19(2008), 1489-1509, (with G.Y. Li) (PDF file)

"Merit functions in vector optimization", Math. Program., Ser. A (2008), 1436-4646, (with C.G. Liu and W.H. Yang)

"Restricted weak upper semi-continuity of subdifferentials of convex functions on Banach spaces", set-valued Analysis, 16(2008), 245-255, (with X.Y. Zheng)

"Calmness For L-Subsmooth Multifunctions in Banach Spaces", SIAM  J. Optim., 19(2008), 1648-1673, (with X.Y. Zheng) (PDF File)

"Error Bounds of Generalized D-gap Functions for Nonsmooth and Nonmonotone Variational Inequality Problems", SIAM J. Optim., 20(2009), 667-690, (with G.Y. Li) (PDF File)

"Strong KKT Conditions and Weak Sharp Solutions in Convex-Composite Optimization", Math. Programming, Series A, (2010), DOI 10.1007/s10107-009-0277-6. (with X.Y. Zheng) (PDF File)

"Constraint Qualifications for Extended Farkas's Lemma and Lagrangian Dualities in Convex Infinite Programming", SIAM J. Optim., 20(2009), 1311-1332, (with D.H. Fang and C. Li) (PDF File)

"Metric Subregularity and Calmness for Nonconvex Generalized Equations in Banach Spaces", SIAM J. Optim., 20(2010), 2119-2136, (with X. Y. Zheng) (PDF File)

"A unified separation theorem for closed sets in a Banach space and optimality conditions for vector optimization", SIAM J. Optim., 21(2011), 886-911, (with X. Y. Zheng) (PDF File)

"Subdifferential calculus rules for supremum functions in convex analysis", SIAM J. Optim., 21(2011), 782-797, (with C. Li) (PDF File)

"Metric subregularity for proximal generalized equations in Hilbert spaces", Nonlinear Anal., (to appear), DOI:10.1016/j.na.2011.07.004. (with X. Y. Zheng) (PDF File)

"Ekeland's variational principle for set-valued functions", SIAM J. Optim., 21(2011), 41-56. (with C.G. Liu) (PDF File)

"Subsmooth semi-infinite and infinite optimization problems", Math. Programming, Series A, 134(2012), 365-393, DOI : 10.1007/s10107-011-0440-8. (with X. Y. Zheng) (PDF File)

"Convergence analysis of the Gauss-Newton method for convex inclusion and convex-composite optimization problems", J. Math. Anal. Appl., (to appear), DOI: 10.1016/j.jmaa.2011.11.062. (with C. Li) (PDF File)

"Approximate Solutions for Abstract Inequality Systems", SIAM J. Optim., 23(2013), no. 2, 1237-1256., (with C. Li)

"Comments on: Farkas’ lemma: three decades of generalizations for mathematical optimization", TOP, DOI 10.1007/s11750-014-0316-1. (with C. Li) (PDF file)

"Metric Subregularity of Piecewise Linear Multifunctions and Applications to Piecewise Linear Multiobjective Optimization", SIAM J. Optim., 24 (2014), no. 1, 154-174. (with X. Y. Zheng) (PDF file)