Vu Ngoc Phat
Full Professor, Doctor of Science
Cộng tác viên

Address
Office: Building A6, Room 504
Tel: +84 (024) 38361121 / 504
Email: vnphat AT math.ac.vn
Education and academic degrees
 B.Sc: 1975, Azerbaijan State University, former USSR
 Ph.D: 1984, Azerbaijan State University, former USSR
 Dr.Sc: 1995, Institute of Mathematics, Polish Academy of Sciences, Warsaw, Poland
 Associate professor: 1992
 Full professor: 2001
Academic Membership:
 American Mathematical Society (AMS)
 Society for Industrial and Applied Mathematíc (SIAM)
 World Scientific and Engineering Society (WSES)
 Mathematical Review (MR)
 Steering Technical Committee of Nonlinear Control Theory (IFAC).
Member of the Editorial Board:
 Optimization, 19982002
 Journal of Applied Mathematics, 2010 – 2015
 Mathematical Problems in Engineering, 20112014
 Nonlinear Functional Analysis and Applications, 1999  2015
 Advances in Nonlinear Variational Inequalities, 2003 
 Acta Mathematica Vietnamica, 2008 
 Vietnam Journal of Mathematics, 2011
 Thai Journal of Mathematics, 2006 
 Journal of Computer Science and Cybernetics, 2018
PUBLICATIONS
List of publications in MathSciNet
List of recent publications
1  Pham T.Huong, Vu Ngoc Phat, Suboptimal finitetime control of singular large scale discretetime equations with delayed interconnections, European Journal of Control Volume 67 (2022), 100701, (SCIE, Scopus). 
2  Piyapong Niamsup, Nguyen T Thanh, Vu Ngoc Phat, Finitetime $H_\infty$ control of linear singular fractional differential equations with timevarying delay, IMA Journal of Mathematical Control and Information, Volume 39 (2022), Pages 773–788, (SCIE, Scopus). 
3  N.H. Sau, P. Niamsup, Vu Ngoc Phat, M.V. Thuan, State bounding for linear positive singular discrete systems with unbounded timevarying delay, Journal of the Franklin Institute, 359 (2022), Pages 45874604, (SCIE, Scopus). 
4  Pham T. Huong, Vu Ngoc Phat, Guaranteed cost finitetime control of largescale singular systems with interconnected delays, Transactions of the Institute of Measurement and Control, 44 (2022), 11031112, (SCIE, Scopus). 
5  Vu Ngoc Phat, Pham T. Huong , Robust finitetime supoptimal control of largescale systems with interacted state and control delays, Journal of Computer Science and Cybernetics, 37 (2021), 529543. 
6  Pham T.Huong, Vu Ngoc Phat, New results on robust finitetime stability of singular largescale complex systems with interconnected delays, Journal of the Franklin Institute, 358(2021), 86788693. SCIE, Scopus. 
7  Nguyen T. Thanh, P. Niamsup, Vu Ngoc Phat, New results on finitetime stability of fractionalorder neural networks with timevarying delays, Neural Computation and Applications, 33 (2021), 1748917496, (SCIE, Scopus). 
8  P. Niamsup, Vu Ngoc Phat, $H_\infty$ control for linear descriptor systems with nondifferentiable delays in both state and observation, Optimization, 70(2021), 18091823, (SCIE , Scopus). 
9  Mai V. Thuan, P. Niamsup, Vu Ngoc Phat, Finitetime control analysis of nonlinear fractionalorder systems subject to disturbances, Bulletin of the Malaysian Mathematical Sciences Society, 44(2021), 14251441. (SCIE, Scopus). 
10  Nguyen T. Thanh, Piyapong Niamsup, Vu Ngoc Phat, Observerbased finitetime control of linear fractionalorder systems with interval timevarying delay, International Journal of Systems Science, Volume 52 (2021), 13861395, (SCIE, Scopus) 
11  Vu Ngoc Phat, P Niamsup, Nguyen Huyen Muoi, State feedback observerbased control design for linear descriptor systems with multiple timevarying delays, IMA Journal of Mathematical Control and Information, 37 (2020), 1218–1236, SCIE, Scopus. 
12  Vu Ngoc Phat, PiyapongNiamsup, Mai Viet Thuan, A new design method for observerbased control of nonlinear fractionalorder systems with timevariable delay, European Journal of Control, 56(2020), 124131, (SCIE, Scopus). 
13  Piyapong Niamsup, Vu Ngoc Phat, State feedback stabilization of linear descriptor timevarying delay systems, Transactions of the Institute of Measurement and Control,Vol. 42, 2020, 21912197, SCIE, Scpous. 
14  Nguyen T. Thanh, Vu Ngoc Phat, Piyapong Niamsup, New finitetime stability analysis singular fractional differential equations with timevarying delay, Fractional Calculus and Applied Analysis; 23(2020), 504517 (SCIE), Scopus. 
15  Nguyen T. Thanh, Vu Ngoc Phat, Improved approach for finitetime stability of nonlinear fractionalorder systems with interval timevarying delay, IEEE Transition on Circuits Systems II: Express Brief, 66 (2019), 13561360, 2019, SCI(E). 
16  Le Hai Yen, Vu Ngoc Phat, Stability analysis of linear polytopic descriptor systems using a novel copositive matrix approach, IEEE Trans. Auto. Control., Vol. 64, No11, 46844690, 2019, SCI(E); Scopus. 
17  Nguyen T. Thanh, Vu Ngoc Phat, Switching law design for finitetime stability of singular fractionalorder systems with delay, IET Control Theory and Applications, 13(2019), 13671373, (SCI(E), Scopus). 
18  Vu Ngoc Phat, Mai Viet Thuan, Tran Ngoc Tuan, New Criteria for Guaranteed Cost Control of Nonlinear FractionalOrder Delay Systems: a Razumikhin Approach, Vietnam Journal of Mathematics, 47 (2019), 403–415, Scopus. 
19  Le Anh Tuan, Vu Ngoc Phat, Existence of Solutions and FiniteTime Stability for Nonlinear Singular DiscreteTime Neural Networks, Bulletin of the Malaysian Mathematical Sciences Society, 42 (2019), 2423–2442, SCI(E), Scopus. 
20  Vu Ngoc Phat, Nguyen Huu Sau, Exponential stabilization of positive singular linear discretetime delay systems with bounded control, IET Control Theory and Applications, 13 (2019), pp. 905 911., SCI(E); Scopus. 
21  N.H. Sau, Vu Ngoc Phat, P. Niamsup, On finitetime stability of linear positive differentialalgebraic delay equations, IEEE Transactions on Circuits and Systems II: Express Briefs, 65 (2018), 19841987, SCI(E). 
22  Vu Ngoc Phat, N.T. Thanh, New criteria for finitetime stability of nonlinear fractionalorder delay systems: A Gronwall inequality approach. Appllied Mathematics Letters, 83 (2018), pp. 169175, SCI(E); Scopus. 
23  Nguyen Huu Sau, Vu Ngoc Phat, LP approach to exponential stabilization of singular positive timedelay systems via memory state feedback, Journal of Industrial and Management Optimization, 14 (2018), 583596, SCI(E); Scopus. 
24  Phan Thanh Nam, Hieu Trinh, Pubudu Nishantha Pathirana, Vu Ngoc Phat, Stability analysis of nonlinear timedelay systems using a novel switched positive systems method, IEEE Transactions on Automatic Control, 63 (2018), 291297, SCI(E); Scopus. 
25  Nguyen Huyen Muoi, Vu Ngoc Phat, P. Niamsup, Criteria for robust finitetime stabilization of linear singular systems with interval timevarying delay, IET Control Theory and Applications, 11 (2017), 1968  1975,SCI(E); Scopus. 
26  N.T. Thanh, P. Niamsup, Vu Ngoc Phat, Finitetime stability of singular nonlinear switched timedelay systems: A singular value decomposition approach, Journal of the Franklin Institute, 354 (2017), 35023518, SCI(E); Scopus. 
27  N.T. Thanh, H. Trinh, Vu Ngoc Phat, Stability analysis of fractional differential timedelay equations, IET Control Theory and Applications, 11 (2017), 10061015, SCI(E); Scopus. 
28  P. Niamsup, N.T. Thanh, Vu Ngoc Phat, Robust finitetime stabilization of nonlinear systems with multiple delays in states and controls, Communications on Applied Nonlinear Analysis, 23 (2016), 113, SCI(E); Scopus. 
29  Nguyen Huyen Muoi, G. Rajchakit, Vu Ngoc Phat, LMI approach to finitetime stability and stabilization of singular discrete delay systems, Acta Applicandae Mathematicae, 146(2016), 8193,SCI(E); Scopus. 
30  P.Niamsup, Vu Ngoc Phat, Robust finitetime control for linear timevarying delay systems with bounded control, Asian Jounal of Control, 18 (2016), 23172324. 
31  Vu Ngoc Phat, N.T. Thanh, H. Trinh, New results on $H_\infty$ filtering for nonlinear largescale systems with interconnected timevarying delays, Optimal Control Applications and Methods, 37 (2016), 958964, SCI(E); Scopus. 
32  Nguyen H.Sau, P.Niamsup, Vu Ngoc Phat, Positivity and stability analysis for linear implicit difference delay equations, Linear Algebra and its Applications, 510 (2016), 25–41, SCI(E); Scopus. 
33  Le A. Tuan, Vu Ngoc Phat, Robust finitetime stability and $H_\infty$ control of linear discretetime delay systems with normbounded disturbances, Acta Mathematica Vietnamica, 41 (2016),481493,Scopus. 
34  Adly Samir, Tạ Thị Huyền Trang, Vu Ngoc Phat, Guaranteed quadratic cost control of nonlinear timevarying delay systems via output feedback stabilization, Pacific Journal of Optimization, 12 (2016), 2016, 649667,SCI(E); Scopus. 
35  P. T. Nam, Vu Ngoc Phat, P. N. Pathirana, H. Trinh, Stability analysis of a general family of nonlinear positive discrete timedelay systems, International Journal of Control, 89 (2016), 13031315, SCI(E); Scopus. 
36  P. Niamsup, Vu Ngoc Phat, A new result on finitetime control of singular linear timedelay systems, Applied Mathematics Letters, 60 (2016), 17, SCI(E); Scopus. 
37  Tạ Thị Huyền Trang, Vu Ngoc Phat, Adly Samir, Finitetime stabilization and H∞ control of nonlinear delay systems via output feedback. Journal of Industrial and Management Optimization 12 (2016), 303–315, SCI(E); Scopus. 
38  Vu Ngoc Phat, Nguyen T. Thanh, H. Trinh, Fullorder observer design for nonlinear complex largescale systems with unknown timevarying delayed interactions. Complexity, 21 (2015), 123133, SCI(E); Scopus. 
39  Le Van Hien, Vu Ngoc Phat, H. Trinh, New generalized Halanay inequalities with applications to stability of nonlinear nonautonomous timedelay systems. Nonlinear Dynamics, 82 (2015), 563575, SCI(E); Scopus. 
40  Vu Ngoc Phat, Nguyen Huyen Muoi, M.V. Bulatov, Robust finitetime stability of linear differentialalgebraic delay equations, Linear Algebra and its Applications, 487 (2015), 146157, SCI(E), Scopus. 
41  Piyapong Niamsup, K. Ratchagit, Vu Ngoc Phat, Novel criteria for finitetime stabilization and guaranteed cost control of delayed neural networks, Neurocomputing, 160 (2015), 281286, SCI(E), Scopus. 
42  Piyapong Niamsup, Vu Ngoc Phat, State Feedback Guaranteed Cost Controller for Nonlinear TimeVarying Delay Systems, Vietnam Journal of Mathematics, 43 (2015), 215228, Scopus. 
43  Le Van Hien, Le Huy Vu, Vu Ngoc Phat, Improved delaydependent exponential stability of singular systems with mixed interval timevarying delays, IET Control Theory & Applications, 9 (2015), 1364  1372, SCI(E), Scopus. 
44  Vu Ngoc Phat, P. Niamsup, Global stabilization of linear timevarying delay systems with bounded controls. Applied Mathematics Letters, 46 (2015), 1116, SCI(E), Scopus. 
45  M.V. Thuan, Vu Ngoc Phat, T.L. Fernando, H. Trinh, Exponential stabilization of timevarying delay systems with nonlinear perturbations, IMA Journal of Mathematical Control and Information, 31 (2014), 441464, SCI(E), Scopus. 
46  M.V. Bulatov, M.N. Machkhina, Vu Ngoc Phat, Existence and uniqueness of solutions to integralalgebraic equations with variable limits of integrations, Communications on Applied Nonlinear Anaysis, 21(2014), 6576, Scopus. 
47  Mai Viet Thuan, Le Van Hien, Vu Ngoc Phat, Exponential stabilization of nonautonomous delayed neural networks via Riccati equations, Applied Mathematics and Computation, 246(2014), 533545, SCI(E), Scopus. 
48  Vu Ngoc Phat, Nguyen Huu Sau, On exponential stability of linear singular positive delayed systems, Applied Mathematics Letters, 38 (2014), 67–72, SCI(E), Scopus. 
49  Vu Ngoc Phat, T. Fernando, H. Trinh, Observerbased control for timevarying delay neural networks with nonlinear observation, Neural Computing and Applications, Vol. 24, 2014, 16391645, SCI(E); Scopus. 
50  Nguyen Truong Thanh, Vu Ngoc Phat, Decentralized stability for switched nonlinear largescale systems with interval timevarying delays in interconnections, Nonlinear Analysis: Hybrid Systems, 11 (2014), 2136, SCI(E); Scopus. 
51  Le A. Tuan, Phan T. Nam, Vu Ngoc Phat, $H_\infty$ controller design for neural networks with mixed interval timevarying delays, Neural Processing Letters, 37(2013), 235249, SCI(E); Scopus. 
52  Vu Ngoc Phat, H. Trinh, Design of $H_\infty $ control of neural networks with timevarying delys, Neural Computing and Applications, 22 (2013), 323  331, SCI(E); Scopus. 
53  Vu Ngoc Phat, $H_\infty$ control for nonlinear systems with interval nondifferentiable timevarying delay, European Journal of Control, 19 (2013), 190  198, SCI(E); Scopus. 
54  Vu Ngoc Phat, T. L. Fernando and H. M. Trinh, Output feedback guaranteed cost control of uncertain linear discrete systems with interval timevarying delays, Applied Mathematical Modelling, 37 (2013), 1580  158, SCI(E); Scopus. 
55  Vu Ngoc Phat, M. V. Thuan, New criteria for stability and stabilization of neural networks with mixed timevarying delays, Vietnam Journal of Mathematics, 40 (2012), 7993, Scopus. 
56  Vu Ngoc Phat, M. V. Thuan and H. M. Trinh, Dynamic output feedback guaranteed cost control of linear systems with timevarying delays in states and outputs, Applied Mathematics and Computation, 218 (2012), 10697–10707, SCI(E); Scopus. 
57  Vu Ngoc Phat, T. L. Fernando and H. M. Trinh, Decentralized stabilization of largescale systems with timevarying delays in interconnections, International Journal of Adaptive Control and Signal Processing, 26 (2012), 541  554, SCI(E); Scopus. 
58  Vu Ngoc Phat, L. V. Hien, New exponential estimate for robust stability of nonlinear neutral time delay systems with convex polytopic uncertainties, Journal Nonlinear and Convex Analysis, 12 (2012), 541  553, SCI(E); Scopus. 
59  Vu Ngoc Phat, Nguyen T. Thanh, Decentralized $H_infty$ control for largescale interconnected nonlinear timedelay systems via LMI approach, Journal of Process Control, 22 (2012), 1325  1339, SCI(E); Scopus. 
60  Vu Ngoc Phat, K. Ratchagit and Y. Khongtham, LMI approach to exponential stability of linear systems with interval timevarying delays, Linear Algebra and its Applications, 336 (2012), Pp. 243–251, SCI(E); Scopus. 
61  Vu Ngoc Phat, M. V. Thuan, Optimal guaranteed cost control of linear systems with mixed timevarying delayed state and control, Journal of Optimization Theory and Applications, 125 (2012), 394  412, SCI(E); Scopus. 
62  Vu Ngoc Phat, Mai Viet Thuan and Hieu Trinh, Observerbased controller design of timedelay systems with an interval timevarying delay, Int. J. Appl. Math. Comput. Sci., 22 (2012), 921  927, SCI(E); Scopus. 
63  Vu Ngoc Phat, K. Ratchagit, Stability and stabilization of switched linear discretetime systems with interval timevarying delay, Nonlinear Analysis: Hybrid Systems 5 (2011), 605  612, SCI(E); Scopus. 
64  Vu Ngoc Phat, T. Botmart and P. Niamsup, Delaydependent exponential stabilization for uncertain linear systems with interval nondifferentiable timevarying delays, Applied Mathematics and Computation 217 (2011), 8236  8247, SCI(E); Scopus. 
65  Vu Ngoc Phat, N. S. Bay and N. M. Lin, Robust $H_\infty $ control of linear timevarying systems with mixed delays in the Hilbert space, Optimal Control Applications and Methods 32 (2011), 545 557, SCI(E); Scopus. 
66  Vu Ngoc Phat, T. T. Anh and L. V. Hien, Stability analysis for linear nonautonomous systems with mixed multiple timevarying delays and applications, Acta Mathematica Vietnamica 36 (2011), 129  143, Scopus. 
67  Vu Ngoc Phat, P. Niamsup, A novel exponential stability condition of hybrid neural networks with timevarying delay, Vietnam Journal of Mathematics 38 (2010), 341  351, Scopus. 
68  Vu Ngoc Phat, L. V. Hien, Robust stabilization of linear polytopic control systems with mixed delays, Acta Mathematica Vietnamica 35 (2010), 427  438, Scopus. 
69  Vu Ngoc Phat, V. Jeyakumar, Stability, stabilization and duality for linear timevarying systems, Optimization, 59 (2010), 447  460, SCI(E); Scopus. 
70  Vu Ngoc Phat, P. T. Nam and H. M. Hien, Asymptotic stability of linear statedelayed neutral systems with polytope type uncertainties, Dynamic Systems and Applications 19 (2010), 63  74, SCI(E); Scopus. 
71  Vu Ngoc Phat, Switched controller design for stabilization of nonlinear hybrid systems with timevarying delays in state and control, Journal of the Franklin Institute, 347 (2010), 195  207, SCI(E); Scopus. 
72  Vu Ngoc Phat, Q. P. Ha and H. Trinh, Parameterdependent $H_\infty$ control for linear time delay polytopic systems, Journal of Optimization Theory and Applications, 147 (2010), 58  70, SCI(E); Scopus. 
73  Vu Ngoc Phat, $H_\infty$ control for nonlinear timevarying delay systems with polytopic type uncertainties, Nonlinear Analysis: Theory, Methods and Applications, 72 (2010), 4254  4263, SCI(E); Scopus. 
74  Vu Ngoc Phat, P. T. Nam, Exponential stability delayed Hopfield neural networks with various activation functions and polytopic uncertainties, Physics Letters A, 374 (2010), 2527  2533, SCI(E); Scopus. 
75  Vu Ngoc Phat, H. Trinh, Exponential stabilization of neural networks with various activation functions and mixed timevarying delays, IEEE Trans. Neural Networks, 21 (2010), 1180  1185. 
76  Vu Ngoc Phat, T. Bormat and P. Niamsup, Switching design for exponential stability of a class of nonlinear hybrid timedelay systems, Nonlinear Analysis: Hybrid Systems, 3 (2009), 1 10. 
77  L.V. Hien, Vu Ngoc Phat, Exponential stabilization for a class of hybrid systems with mixed delays in state and control, Nonlinear Analysis: Hybrid Systems, 3 (2009), 259 265. 
78  P. Niamsup, Vu Ngoc Phat, $H_\infty $ optimal control of LTV systems with timevarying delay via controllability approach, ScienceAsia, 35 (2009), 284289. 
79  L.V. Hien, Vu Ngoc Phat, Delay feedback control in exponential stabilization of linear timevarying systems with input delay, IMA J. Math. Contr. Inform., 26 (2009), 163177. 
80  L.V.Hien, Vu Ngoc Phat, Exponential stability and stabilization of a class of uncertain linear timedelay systems, J. of the Franklin Institute, 346 (2009), 611625. 
81  L.V. Hien, Q.P. Ha, Vu Ngoc Phat, Stability and stabilization of switched linear dynamic systems with time delay and uncertainties, Appl. Math. Computation, 210 (2009), 223231. 
82  P.T. Nam, Vu Ngoc Phat, Robust stabilization of linear systems with delayed state and control, J. Optim. Theory Appl., 140 (2009), 287299. 
83  P.T. Nam, Vu Ngoc Phat, An improved stability criterion for a class of neutral differential equations, Appl. Math. Letters, 22 (2009), 3135. 
84  Vu Ngoc Phat, Q.P. Ha, $H_\infty$ control and exponential stability for a class of nonlinear nonautonomous systems with timevarying delay, J. Optim. Theory Appl., 142, (2009), 603618. 
85  Vu Ngoc Phat, L.V. Hien, An application of Razumikhin theorem to exponential stability for linear nonautonomous systems with arbitrary timevarying delays, Appl. Math. Letters, 22 (2009), 14121417. 
86  Vu Ngoc Phat, Memoryless $H_\infty$ controller design for switched nonlinear systems with mixed timevarying delays, Int. J. of Control, 82 (2009), 18891898. 
87  Vu Ngoc Phat, P. Niamsup, Stability analysis for a class of functional differential equations and applications,Nonlinear Anal.: Theory, Methods \& Applications, 71 (2009), 6265  6275. 
88  P. Niamsup, K. Mukdasai, Vu Ngoc Phat, Linear uncertain nonautonomous timedelay systems: stability and stabilizability via Riccati equations, Electron, J. Differential Equations 2008, 10 pp. 
89  Phan Than Nam, Vu Ngoc Phat, Robust exponential stability and stabilization of linear uncertain polytopic timedelay systems, J. Control Theory Appl. 6 (2008), 163  170. 
90  Vu Ngoc Phat, D. Q. Vinh and N. S. Bay, $L_2$stabilization and $H_\infty$ control for linear nonautonomous timedelay systems in Hilbert spaces via Riccati equations, Adv. Nonlinear Var. Inequal. 11 (2008), 75  86. 
91  P. Niamsup, K. Mukdasai, Vu Ngoc Phat, Improved exponential stability for timevarying systems with nonlinear delayed perturbations, Appl. Math. Computation, 204 (2008), 490495. 
92  Vu Ngoc Phat, Q.P. Ha, New characterization of stabilizability via Riccati equations for LTV systems, IMA J. Math.Contr. Inform., 25 (2008), 419429. 
93  Vu Ngoc Phat, Phan Thanh Nam, Exponential stability and stabilization of uncertain linear timevarying systems using parameter dependent Lyapunov function, Internat. J. Control 80 (2007), N0 8, 1333  1341. 
94  Vu Ngoc Phat, Dao Quang Vinh, Controllability and $H_\infty$ control for linear continuous timevarying uncertain systems. Differential equations and applications, 4 (2007), 105  111. 
95  Vu Ngoc Phat, S. Pairote, Exponential stability of switched linear systems with timevarying delay, Electron. J. Differential Equations 2007, 10 pp. 
96  Vu Ngoc Phat, Global stabilization for linear continuous timevarying systems, Appl. Math. Comput. 175 (2006), 1730  1743. 
97  Vu Ngoc Phat, Satiracoo Pairote, Global stabilization of linear periodically timevarying switched systems via matrix inequalities, J. Control Theory Appl. 4 (2006), 26  31. 
98  Vu Ngoc Phat, Piyapong Niamsup, Stability of linear timevarying delay systems and applications to control problems, J. Comput. Appl. Math. 194 (2006), 343  356. 
99  Vu Ngoc Phat, Sufficient conditions for stabilizability of linear periodic differential equations, Southeast Asian Bull. Math. 30 (2006), 331  340. 
100  Vu Ngoc Phat, P. Niamsup, Stabilization of linear nonautonomous systems with normbounded controls, J. Optim. Theory Appl. 131 (2006), 135  149. 
101  Vu Ngoc Phat, Phan Thanh Nam, Exponential stability criteria of linear nonautonomous systems with multiple delays, Electron. J. Differential Equations 2005, N0 58, 8 pp. 
102  Vu Ngoc Phat, A. V. Savkin, Robust setvalued state estimation for linear timevarying systems in Hilbert spaces, Nonlinear Funct. Anal. Appl. 10 (2005), 285  298. 
103  Vu Ngoc Phat, A. V. Savkin, Robust setvalued state estimation for linear timevarying systems in Hilbert spaces, Nonlinear Funct. Anal. Appl. 10 (2005), 285  298. 
104  Vu Ngoc Phat, J. Jiang, Stabilization of nonlinear discretetime systems via a digital communication channel. Int. J. Math. Math. Sc. 1 (2005), 43  56. 
105  Vu Ngoc Phat, Robust stability and stabilizability of uncertain linear hybrid systems with state delays, IEEE Trans. on CAS II 52 (2004), 894  898. 
106  Vu Ngoc Phat, D. Q. Vinh, Controllability and Hinfinity control of linear continuous timevarying uncertain systems. Diff. Equations and Appl. 4 (2004), 313  327. 
107  Vu Ngoc Phat, Jianming Jiang, Andrey V. Savkin, Ian R. Petersen, Robust stabilization of linear uncertain discretetime systems via a limited capacity communication channel, Systems Control Letters. 53 (2004), 347  360. 
108  Vu Ngoc Phat, Nonlinear $H_\inf}$ control in Hilbert spaces via Riccati operator equation, Nonlinear Funct. Anal. Appl. 9 (2004), 79  92. 
109  Vu Ngoc Phat, N. M. Linh, On the stabilization of nonlinear continuoustime systems in Hilbert spaces, Southeast Asian Bull. Math. 27 (2003), 135  142. 
110  Nguyen Sinh Bay, Vu Ngoc Phat, Stability analysis of nonlinear retarded difference equations in Banach spaces. Advances in difference equations, IV, Comput. Math. Appl. 45 (2003), 951  960. 
111  Nguyen Sinh Bay, Nguyen The Hoan, Vu Ngoc Phat, On the asymptotic stability of timevarying differential equations with multiple delays and applications, Acta Math. Vietnam. 28 (2003), 51  64. 
112  Vu Ngoc Phat, On the stability of a class of nonlinear timedelay differential control systems in Banach spaces, Diff. Equations and Appl. 3 (2003), 203  218. 
113  Vu Ngoc Phat, Complete stabilization of distributed parameter systems: A controllability analysis approach. In: Proc. 15th Int. IFAC’2002 Congress, July, 2002, Barcelona, 1325  1330. 
114  Vu Ngoc Phat, Andrey V. Savkin, Robust state estimation for a class of uncertain timedelay systems. Systems Control Letters, 47 (2002), 237  245. 
115  Vu Ngoc Phat, New stabilization criteria for linear timevarying systems with state delay and normbounded uncertainties. IEEE Trans. Automat. Control 47 (2002), 2095  2098. 
116  Vu Ngoc Phat, Nguyen Sinh Bay, Asymptotic stability of a class of nonlinear functional differential equations, Nonlinear Funct. Anal. Appl. 7 (2002), 299  311. 
117  Vu Ngoc Phat, Nguyen Sinh Bay, Lyapunov stability and stabilizability of linear differential timevarying delay systems in Hilbert spaces, Far East J. Math. Sci. (FJMS) 5 (2002), N0 1, 65  80. 
118  Vu Ngoc Phat, Tran Tin Kiet, On the Lyapunov equation in Banach spaces and applications to control problems, Int. J. Math. Math. Sci. 29 (2002), 155  166. 
119  J. Y. Park, Vu Ngoc Phat, I. H. Jung, Constrained controllability of linear timevarying systems in Banach spaces, Optimization 50 (2001), 187  204. 
120  Vu Ngoc Phat, Stabilization of linear continuous timevarying systems with state delays in Hilbert spaces, Elect. J. Diff. Equations (2001), 1  12. 
121  Nguyen Manh Linh, Vu Ngoc Phat, Exponential stability of nonlinear timevarying differential equations and applications, Elect. J. Diff. Equations (2001), N0 34, 1  12. 
122  Vu Ngoc Phat, T. T. Kiet, Global controllability to a target set of a discretetime system in Banach spaces. Nonlinear Funct. Anal. Appl. 5 (2000), 23  37. 
123  Jong Yeoul Park, Vu Ngoc Phat, Il Hyo Jung, On stability of nonlinear nonautonomous systems by Lyapunov's direct method. J. Korean Math. Soc. 37 (2000), 805  821. 
124  Vu Ngoc Phat, Constrained controllability theory: from linear to nonlinear dynamical discretetime systems. EastWest J. Math. 2 (2000), 1  19. 
125  Vu Ngoc Phat, J. Y. Park, On the Gronwall inequality and asymptotic stability of nonlinear discrete systems with multiple delays. Dynam. Systems Appl. 9 (2000), 309  321. 
126  Vu Ngoc Phat, Tran Tin Kiet, Lyapunov stability of nonlinear timevarying differential equations, Acta Math. Vietnam. 25 (2000), N0 2, 231  249. 
127  Vu Ngoc Phat, Jong Yeoul Park, and Il Hyo Jung, Constrained controllability of linear timevarying Stability and constrained controllability of linear control systems in Banach spaces. J. Korean Math. Society 37 (2000), 593  612. 
128  P. Niamsup, Vu Ngoc Phat, Asymptotic stability of nonlinear control systems described by differential equations with multiple delays. Elect. J. Diff. Equations 11 (2000), 1  17. 
129  Vu Ngoc Phat, Introduction to mathematical control theory (in Vietnamese) – Nhập môn lý thuyết điều khiển tối ưu. NXB ĐHQG, Hanoi, 2000, 245 trang. 
130  Vu Ngoc Phat, Tran Tin Kiet, On the stabilizability of nonlinear systems in finitedimensional spaces. Funct. Anal. Appl. 4 (1999), 73  85. 
131  Vu Ngoc Phat, KreinRutman theorem on existence of eigenvectors in Banach spaces : Recent extensions and applications. Nonl. Funct. Anal. Appl. 4 (1999), 25  40. 
132  Nguyen Sinh Bay, Vu Ngoc Phat, Stability of nonlinear discrete timevarying retarded systems. Vietnam J. Math. 27 (1999), 373  377. 
133  Vu Ngoc Phat, On the stability and stabilizability of nonlinear dynamical systems. Nonlinear Anal. Forum. 4 (1999), 65  75. 
134  Vu Ngoc Phat, On the stability of timevarying differential equations. Optimization 45 (1999), 237  254. 
135  Vu Ngoc Phat, J. Y. Park, Asymptotic stability of nonlinear purturbed discrete systems with multiple delays. In: Proc. Inter. Conf. Math. Anal. Appl. Chinju, Korea, 5 (1998), 123  137. 
136  Vu Ngoc Phat, Jong Yeoul Park, Further generalizations of Farkas' theorem and applications in optimal control. J. Math. Anal. Appl. 216 (1997), 23  39. 
137  Vu Ngoc Phat, Weak asymptotic stabilizability of discretetime inclusions given by setvalued operators. J. Math. Anal. Appl. 202 (1996), 353  369. 
138  Vu Ngoc Phat, Constrained control problems of discrete processes. World Scientific, SingaporeNew JerseyLondon, 1996, 228p. 
139  Vu Ngoc Phat, Constrained controllability theory of dynamical systems. Dr. Sc. Thesis, Institute of Mathematics, Polish Academy of Sciences, Warszawa, Poland, 1995. 
140  Vu Ngoc Phat, Some aspects of constrained controllability of discretetime dynamical systems. Optimization 33 (1995), 57  79. 
141  Vu Ngoc Phat, Constrained controllability of linear control infinitedimensional systems: A setvalued analysis approach. IMA J. Math. Contr. Inform. 11 (1994), 185  199. 
142  Vu Ngoc Phat, Constrained controllability and reachability of linear discretetime descriptor systems. Optimization 31 (1994), 165  177. 
143  Vu Ngoc Phat, Some remarks on controllability and reachability of nonstationary discretetime processes. Optimization 29 (1994), 173  180. 
144  Vu Ngoc Phat, Trinh Cong Dieu, On the KreinRutman theorem and its applications in controllability. Proceedings of AMS 124 (1994), 495  501. 
145  Vu Ngoc Phat, K. Balachandra, On the controllability of linear descriptor systems in Banach spaces. Acta Math. Vietnam. 1 (1992), 67  76. 
146  Vu Ngoc Phat, K. Murugesan, A note on constrained controllability of linear descriptor systems. Optimization 25 (1992), 77  82. 
147  Vu Ngoc Phat, Trinh Cong Dieu, Linear control discretetime systems with disturbances: Constrained controllability to a subset. Optimization 24 (1992), 319  327. 
148  Vu Ngoc Phat, Trinh Cong Dieu, Constrained controllability of linear discretetime systems with constrained controls and states in Banach spaces. SIAM J. Contr. and Optim. 30 (1992), 1311  1319. 
149  Vu Ngoc Phat, Controllability problems of dynamical syatems: a setvalued approach. In: Proc. of the 36th Int. Colloquium on Applied Mathematics, Ilmelnau, Germany, October 1991, 121132. 
150  Vu Ngoc Phat, Control problems of nonlinear dynamical systems with phase constraints. Inter. Series of Numerical Analysis 99 (1991), 433  440. 
151  Vu Ngoc Phat, Nguyen Khoa Son, Linear nonstationary discretetime systems: Null controllability with restrained controls in Banach spaces. Optimization. 2 (1990), 271  279. 
152  Vu Ngoc Phat, An application of implicit function theorem in the solution of controllability problems. Kibernetika, USSR, 4 (1990), 55  59. English translation: Cybernetics, 27 (1990). 
153  Vu Ngoc Phat, New results on controllability of linear nonstationary systems with constrained controls and states. In: Proc. of 14th Inter. Conference on Math. Optimization and Applications, Eisenach, FRG, December 1116, 1989, 92  103. 
154  Vu Ngoc Phat, Controllability of linear discretetime systems with multiple delays on controls and states. Int. J. Contr. 5 (1989), 1645  1654. 
155  Vu Ngoc Phat, Controllability of linear timedependent systems with a phase constraint. Avtomatika i Telemekhanika, USSR 8 (1988), 51  59. English translation: Automat Remote Control 49 (1988), 998  1004. 
156  Vu Ngoc Phat, Controllability of nonlinear discretetime systems without differentiability assumption. Optimization 19 (1988), 133  142. 
157  Vu Ngoc Phat, Approximate controllability of nonlinear discretetime systems in Banach spaces. Acta Math. Vietnam. 13 (1988), 81  88. 
158  Vu Ngoc Phat, R.G. Faradzev and V. A. Shapiro, Controllability theory of dynamical discretetime systems. Avtomatika i Telemekhanika, USSR 1(1986), English translation: Automat Remote Control 47 (1986), 1  23. 
159  Vu Ngoc Phat, Controllability in multivalued discretetime processes. Kibernetika, USSR 5(1986), 6267. English translation: Cybernetics 22 (1986), 610  615. 
160  Vu Ngoc Phat, On the controllability of nonlinear two parameter discretetime systems with constrained controls. Optimization 16 (1985), 869  876. 
161  Vu Ngoc Phat, Qualitative properties of nonlinear dynamical systems. Ph. D. Thesis, Azerbaizan University, Bacu, USSR 1984 (in Russian). 
162  Vu Ngoc Phat, Pseudoconvex sets and controllability of discretetime systems in Banach spaces. Vestnik Kharcov University, USSR 254 (1984), 57  61. (in Russian). 
163  Vu Ngoc Phat, Controllability of nonlinear twoparametric discretetime systems. Probl. Optim. ASU, Bacu, USSR (1983), 171  179 (in Russian). 
164  Vu Ngoc Phat, Controllability of discretetime systems with nonconvex restrained controls. Optimization 14 (1983), 371  375. 
165  Vu Ngoc Phat, Controllability problem of general nonlinear processes. Vietnam J. Math. 2 (1981), 27  31 (in Vietnamese). 
166  Vu Ngoc Phat, Controllability of nonlinear dynamical discretetime systems. Acta Math. Vietnam. 2 (1980), 63  74. 
167  Vu Ngoc Phat, Controllability of pseudolinear dynamical systems. Vietnam J. Math. 2 (1980), 18  23 (in Vietnamese). 
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