Vu Ngoc Phat


Full Professor, Doctor of Science

Department of Optimization and Control Theory
Research interests: Systems and control theory of differential-difference equations, singular systems, hybrid systems, fractional-order systems, positive systems.


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, 1998-2002
  • Journal of Applied Mathematics, 2010 – 2015
  • Mathematical Problems in Engineering, 2011-2014
  • 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
1Nguyen T. Thanh, Vu Ngoc Phat, Improved approach for finite-time stability of nonlinear fractional-order systems with interval time-varying delay, IEEE Transition on Circuits Systems II: Express Brief, 66 (2019), 1356-1360, 2019, SCI(-E).
2Le 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, 4684-4690, 2019, SCI(-E); Scopus.
3Nguyen T. Thanh, Vu Ngoc Phat, Switching law design for finite-time stability of singular fractional-order systems with delay, IET Control Theory and Applications, 13(2019), 1367-1373, (SCI(-E), Scopus).
4Vu Ngoc Phat, Mai Viet Thuan, Tran Ngoc Tuan, New Criteria for Guaranteed Cost Control of Nonlinear Fractional-Order Delay Systems: a Razumikhin Approach, Vietnam Journal of Mathematics, 47 (2019), 403–415, Scopus.
5Le Anh Tuan, Vu Ngoc Phat, Existence of Solutions and Finite-Time Stability for Nonlinear Singular Discrete-Time Neural Networks, Bulletin of the Malaysian Mathematical Sciences Society, 42 (2019), 2423–2442, SCI-(E), Scopus.
6Vu Ngoc Phat, Nguyen Huu Sau, Exponential stabilization of positive singular linear discrete-time delay systems with bounded control, IET Control Theory and Applications, 13 (2019), pp. 905 -911., SCI(-E); Scopus.
7N.H. Sau, Vu Ngoc Phat, P. Niamsup, On finite-time stability of linear positive differential-algebraic delay equations, IEEE Transactions on Circuits and Systems II: Express Briefs, 65 (2018), 1984-1987, SCI-(E).
8Vu Ngoc Phat, N.T. Thanh, New criteria for finite-time stability of nonlinear fractional-order delay systems: A Gronwall inequality approach. Appllied Mathematics Letters, 83 (2018), pp. 169-175, SCI(-E); Scopus.
9Nguyen Huu Sau, Vu Ngoc Phat, LP approach to exponential stabilization of singular positive time-delay systems via memory state feedback, Journal of Industrial and Management Optimization, 14 (2018), 583-596, SCI(-E); Scopus.
10Phan Thanh Nam, Hieu Trinh, Pubudu Nishantha Pathirana, Vu Ngoc Phat, Stability analysis of nonlinear time-delay systems using a novel switched positive systems method, IEEE Transactions on Automatic Control, 63 (2018), 291-297, SCI(-E); Scopus.
11Nguyen Huyen Muoi, Vu Ngoc Phat, P. Niamsup, Criteria for robust finite-time stabilization of linear singular systems with interval time-varying delay, IET Control Theory and Applications, 11 (2017), 1968 - 1975,SCI(-E); Scopus.
12N.T. Thanh, P. Niamsup, Vu Ngoc Phat, Finite-time stability of singular nonlinear switched time-delay systems: A singular value decomposition approach, Journal of the Franklin Institute, 354 (2017), 3502-3518, SCI(-E); Scopus.
13N.T. Thanh, H. Trinh, Vu Ngoc Phat, Stability analysis of fractional differential  time-delay equations, IET Control Theory and Applications, 11 (2017), 1006-1015, SCI(-E); Scopus.
14P. Niamsup, N.T. Thanh, Vu Ngoc Phat, Robust finite-time stabilization of nonlinear systems with multiple delays in states and controls, Communications on Applied Nonlinear Analysis, 23 (2016), 1-13, SCI(-E); Scopus.
15Nguyen Huyen Muoi, G. Rajchakit, Vu Ngoc Phat, LMI approach to finite-time stability and stabilization of singular discrete delay systems, Acta Applicandae Mathematicae, 146(2016), 81-93,SCI(-E); Scopus.
16P.Niamsup, Vu Ngoc Phat, Robust finite-time control for linear time-varying delay systems with bounded control, Asian Jounal of Control, 18 (2016), 2317-2324.
17Vu Ngoc Phat, N.T. Thanh, H. Trinh, New results on $H_\infty$ filtering for nonlinear large-scale systems with interconnected time-varying delays, Optimal Control Applications and Methods, 37 (2016), 958-964, SCI(-E); Scopus.
18Nguyen 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.
19Le A. Tuan, Vu Ngoc Phat, Robust finite-time stability and $H_\infty$ control of linear discrete-time delay systems with norm-bounded disturbances, Acta Mathematica Vietnamica, 41 (2016),481-493,Scopus.
20Adly Samir, Tạ Thị Huyền Trang, Vu Ngoc Phat, Guaranteed quadratic cost control of nonlinear time-varying delay systems via output feedback stabilization, Pacific Journal of Optimization, 12 (2016), 2016, 649-667,SCI(-E); Scopus.
21P. T. Nam, Vu Ngoc Phat, P. N. Pathirana, H. Trinh, Stability analysis of a general family of nonlinear positive discrete time-delay systems, International Journal of Control, 89 (2016), 1303-1315, SCI(-E); Scopus.
22P. Niamsup, Vu Ngoc Phat, A new result on finite-time control of singular linear time-delay systems, Applied Mathematics Letters, 60 (2016), 1-7, SCI(-E); Scopus.
23Tạ Thị Huyền Trang, Vu Ngoc Phat, Adly Samir, Finite-time stabilization and H∞ control of nonlinear delay systems via output feedback. Journal of Industrial and Management Optimization 12 (2016), 303–315, SCI(-E); Scopus.
24Vu Ngoc Phat, Nguyen T. Thanh, H. Trinh, Full-order observer design for nonlinear complex large-scale systems with unknown time-varying delayed interactions. Complexity, 21 (2015), 123-133, SCI(-E); Scopus.
25Le Van Hien, Vu Ngoc Phat, H. Trinh, New generalized Halanay inequalities with applications to stability of nonlinear non-autonomous time-delay systems. Nonlinear Dynamics, 82 (2015), 563-575, SCI(-E); Scopus.
26Vu Ngoc Phat, Nguyen Huyen Muoi, M.V. Bulatov, Robust finite-time stability of linear differential-algebraic delay equations, Linear Algebra and its Applications, 487 (2015), 146-157, SCI(-E), Scopus.
27Piyapong Niamsup, K. Ratchagit, Vu Ngoc Phat, Novel criteria for finite-time stabilization and guaranteed cost control of delayed neural networks, Neurocomputing, 160 (2015), 281-286, SCI(-E), Scopus.
28Piyapong Niamsup, Vu Ngoc Phat, State Feedback Guaranteed Cost Controller for Nonlinear Time-Varying Delay Systems, Vietnam Journal of Mathematics, 43 (2015), 215-228, Scopus.
29Le Van Hien, Le Huy Vu, Vu Ngoc Phat, Improved delay-dependent exponential stability of singular systems with mixed interval time-varying delays, IET Control Theory & Applications, 9 (2015), 1364 - 1372, SCI(-E), Scopus.
30Vu Ngoc Phat, P. Niamsup, Global stabilization of linear time-varying delay systems with bounded controls. Applied Mathematics Letters, 46 (2015), 11-16, SCI(-E), Scopus.
31M.V. Thuan, Vu Ngoc Phat, T.L. Fernando, H. Trinh, Exponential stabilization of time-varying delay systems with nonlinear perturbations, IMA Journal of Mathematical Control and Information, 31 (2014), 441-464, SCI(-E), Scopus.
32M.V. Bulatov, M.N. Machkhina, Vu Ngoc Phat, Existence and uniqueness of solutions to integral-algebraic equations  with variable limits of integrations, Communications on Applied Nonlinear Anaysis,  21(2014), 65-76, Scopus.
33Mai Viet Thuan, Le Van Hien, Vu Ngoc Phat, Exponential stabilization of non-autonomous delayed neural networks via Riccati equations, Applied Mathematics and Computation, 246(2014), 533-545, SCI(-E), Scopus.
34Vu Ngoc Phat, Nguyen Huu Sau, On exponential stability of linear singular positive delayed systems, Applied Mathematics Letters, 38 (2014), 67–72, SCI(-E), Scopus.
35Vu Ngoc Phat, T. Fernando, H. Trinh, Observer-based control for time-varying delay neural networks with nonlinear observation, Neural Computing and Applications, Vol. 24, 2014, 1639-1645, SCI(-E); Scopus.
36Nguyen Truong Thanh, Vu Ngoc Phat, Decentralized stability for   switched  nonlinear large-scale  systems with interval  time-varying delays in interconnections,  Nonlinear Analysis: Hybrid Systems,  11 (2014),  21-36, SCI(-E); Scopus.
37Le A. Tuan, Phan T. Nam, Vu Ngoc Phat, $H_\infty$ controller design for neural networks with mixed interval time-varying delays, Neural Processing Letters, 37(2013), 235-249, SCI(-E); Scopus.
38Vu Ngoc Phat, H. Trinh, Design of $H_\infty $ control of neural networks with time-varying delys, Neural Computing and Applications, 22 (2013), 323 - 331, SCI(-E); Scopus.
39Vu Ngoc Phat, $H_\infty$ control for nonlinear systems with interval non-differentiable time-varying delay, European Journal of Control, 19 (2013), 190 - 198, SCI(-E); Scopus.
40Vu Ngoc Phat, T. L. Fernando and H. M. Trinh, Output feedback guaranteed cost control of uncertain linear discrete systems with interval time-varying delays, Applied Mathematical Modelling, 37 (2013), 1580 - 158, SCI(-E); Scopus.
41Vu Ngoc Phat, M. V. Thuan, New criteria for  stability and stabilization of neural networks with mixed  time-varying delays,  Vietnam Journal of Mathematics, 40 (2012), 79-93, Scopus.
42Vu Ngoc Phat, M. V. Thuan and H. M. Trinh, Dynamic output feedback guaranteed cost control of linear  systems with    time-varying delays in states and outputs,  Applied Mathematics and Computation, 218 (2012), 10697–10707, SCI(-E); Scopus.
43Vu Ngoc Phat, T. L. Fernando and H. M. Trinh, Decentralized stabilization of large-scale systems with  time-varying delays in  interconnections,  International Journal of Adaptive Control and Signal Processing,  26 (2012), 541 -- 554, SCI(-E); Scopus.
44Vu 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.
45Vu Ngoc Phat, Nguyen T. Thanh, Decentralized $H_infty$ control for  large-scale  interconnected nonlinear time-delay  systems  via  LMI approach,  Journal of Process Control, 22 (2012), 1325 -- 1339, SCI(-E); Scopus.
46Vu Ngoc Phat, K. Ratchagit and Y. Khongtham, LMI approach to exponential stability of linear  systems with  interval  time-varying delays,  Linear Algebra and its Applications, 336 (2012), Pp. 243–251, SCI(-E); Scopus.
47Vu Ngoc Phat, M. V. Thuan, Optimal guaranteed cost control of linear systems with mixed time-varying delayed state and control,  Journal of Optimization Theory and Applications, 125 (2012), 394 -- 412, SCI(-E); Scopus.
48Vu Ngoc Phat, Mai Viet Thuan and Hieu Trinh, Observer-based controller design of time-delay systems with an interval time-varying delay, Int. J. Appl. Math. Comput. Sci., 22 (2012), 921 -- 927, SCI(-E); Scopus.
49Vu Ngoc Phat, K. Ratchagit, Stability and stabilization of switched linear discrete-time systems with interval time-varying delay,  Nonlinear Analysis: Hybrid Systems  5 (2011), 605 - 612, SCI(-E); Scopus.
50Vu Ngoc Phat, T. Botmart and P. Niamsup, Delay-dependent exponential stabilization for uncertain linear systems with interval non-differentiable time-varying delays,  Applied Mathematics and Computation  217 (2011), 8236 - 8247, SCI(-E); Scopus.
51Vu Ngoc Phat, N. S. Bay and N. M. Lin, Robust $H_\infty $ control of linear time-varying systems with mixed delays in the Hilbert space, Optimal Control Applications and Methods 32 (2011), 545 -557, SCI(-E); Scopus.
52Vu Ngoc Phat, T. T. Anh and L. V. Hien, Stability analysis for linear non-autonomous  systems with mixed multiple time-varying delays and applicationsActa Mathematica Vietnamica 36 (2011), 129 -- 143, Scopus.
53Vu Ngoc Phat, P. Niamsup, A novel exponential stability condition of hybrid neural networks with time-varying delay, Vietnam Journal of Mathematics 38 (2010), 341 - 351, Scopus.
54Vu Ngoc Phat, L. V. Hien, Robust stabilization of linear polytopic control systems with mixed delays, Acta Mathematica Vietnamica 35 (2010), 427 - 438, Scopus.
55Vu Ngoc Phat, V. Jeyakumar, Stability, stabilization and duality for linear time-varying systems, Optimization, 59 (2010), 447 -- 460, SCI(-E); Scopus.
56Vu Ngoc Phat, P. T. Nam and H. M. Hien, Asymptotic stability of linear state-delayed neutral systems with polytope type uncertainties, Dynamic Systems and Applications 19 (2010), 63 -- 74, SCI(-E); Scopus.
57Vu Ngoc Phat, Switched controller design for stabilization of nonlinear hybrid systems with time-varying delays in state and control, Journal of the Franklin Institute, 347 (2010), 195 -- 207, SCI(-E); Scopus.
58Vu Ngoc Phat, Q. P. Ha and H. Trinh, Parameter-dependent $H_\infty$ control for linear time delay polytopic systems, Journal of Optimization Theory and Applications, 147 (2010), 58 -- 70, SCI(-E); Scopus.
59Vu Ngoc Phat, $H_\infty$ control for nonlinear time-varying delay systems with polytopic type uncertainties, Nonlinear Analysis: Theory, Methods and Applications, 72 (2010), 4254 -- 4263, SCI(-E); Scopus.
60Vu 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.
61Vu Ngoc Phat, H. Trinh, Exponential stabilization of neural networks with various activation functions and mixed time-varying delays,  IEEE Trans. Neural Networks, 21 (2010), 1180 -- 1185.
62Vu Ngoc Phat, T. Bormat and P. Niamsup, Switching design for exponential stability of a class of nonlinear hybrid time-delay systems, Nonlinear Analysis: Hybrid Systems,  3 (2009), 1- 10.
63L.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.
64P. Niamsup, Vu Ngoc Phat, $H_\infty $ optimal control  of LTV systems with time-varying delay via controllability approach,  ScienceAsia, 35 (2009), 284-289.
65L.V. Hien, Vu Ngoc Phat, Delay feedback control in exponential stabilization of linear time-varying systems with input delay, IMA J. Math. Contr. Inform., 26 (2009), 163-177.
66L.V.Hien, Vu Ngoc Phat, Exponential stability and stabilization of a class of uncertain linear time-delay systems,  J. of the Franklin Institute, 346 (2009), 611-625.
67L.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), 223-231.
68P.T. Nam, Vu Ngoc Phat, Robust stabilization of linear systems with delayed state and control, J. Optim. Theory Appl., 140 (2009), 287-299.
69P.T. Nam, Vu Ngoc Phat, An improved stability criterion for a class of  neutral differential equations,  Appl. Math. Letters, 22 (2009), 31-35.
70Vu Ngoc Phat, Q.P. Ha, $H_\infty$ control and exponential stability for a class of nonlinear non-autonomous systems with time-varying delay, J. Optim. Theory Appl., 142, (2009), 603-618.
71Vu Ngoc Phat, L.V. Hien, An application of Razumikhin theorem to exponential stability for linear non-autonomous systems with arbitrary time-varying delays, Appl. Math. Letters, 22 (2009), 1412-1417.
72Vu Ngoc Phat, Memoryless $H_\infty$ controller design for switched nonlinear systems with mixed time-varying delays,  Int. J. of Control, 82 (2009),  1889-1898.
73Vu Ngoc Phat, P. Niamsup, Stability analysis for a class of functional differential equations and applications,Nonlinear Anal.: Theory, Methods \& Applications, 71 (2009), 6265 -- 6275.
74P. Niamsup, K. Mukdasai, Vu Ngoc Phat, Linear uncertain non-autonomous time-delay systems: stability and stabilizability via Riccati equations, Electron, J. Differential Equations 2008, 10 pp.
75Phan Than Nam, Vu Ngoc Phat, Robust exponential stability and stabilization of linear uncertain polytopic time-delay systems, J. Control Theory Appl. 6 (2008), 163 - 170.
76Vu Ngoc Phat, D. Q. Vinh and N. S. Bay, $L_2$-stabilization and $H_\infty$ control for linear non-autonomous time-delay systems in Hilbert spaces via Riccati equations, Adv. Nonlinear Var. Inequal. 11 (2008), 75 - 86.
77P. Niamsup, K. Mukdasai, Vu Ngoc Phat, Improved exponential stability for time-varying systems with nonlinear delayed perturbations,  Appl. Math. Computation, 204 (2008), 490-495.
78Vu Ngoc Phat, Q.P. Ha, New characterization of stabilizability via Riccati equations for LTV systems, IMA J. Math.Contr. Inform.,  25 (2008), 419-429.
79Vu Ngoc Phat, Phan Thanh Nam, Exponential stability and stabilization of uncertain linear time-varying systems using parameter dependent Lyapunov function, Internat. J. Control 80 (2007), N0 8, 1333 - 1341.
80Vu Ngoc Phat, Dao Quang Vinh, Controllability and $H_\infty$ control for linear continuous time-varying uncertain systems. Differential equations and applications,  4 (2007), 105 - 111.
81Vu Ngoc Phat, S. Pairote, Exponential stability of switched linear systems with time-varying delay, Electron. J. Differential Equations 2007, 10 pp.
82Vu Ngoc Phat, Global stabilization for linear continuous time-varying systems, Appl. Math. Comput. 175 (2006), 1730 - 1743.
83Vu Ngoc Phat, Satiracoo Pairote, Global stabilization of linear periodically time-varying switched systems via matrix inequalities, J. Control Theory Appl. 4 (2006), 26 - 31.
84Vu Ngoc Phat, Piyapong Niamsup, Stability of linear time-varying delay systems and applications to control problems, J. Comput. Appl. Math. 194 (2006), 343 - 356.
85Vu Ngoc Phat, Sufficient conditions for stabilizability of linear periodic differential equations, Southeast Asian Bull. Math. 30 (2006), 331 - 340.
86Vu Ngoc Phat, P. Niamsup, Stabilization of linear nonautonomous systems with norm-bounded controls, J. Optim. Theory Appl. 131 (2006), 135 - 149.
87Vu Ngoc Phat, Phan Thanh Nam, Exponential stability criteria of linear non-autonomous systems with multiple delaysElectron. J. Differential Equations 2005, N0 58, 8 pp.
88Vu Ngoc Phat, A. V. Savkin, Robust set-valued state estimation for linear time-varying systems in Hilbert spaces, Nonlinear Funct. Anal. Appl. 10 (2005), 285 - 298.
89Vu Ngoc Phat, A. V. Savkin, Robust set-valued state estimation for linear time-varying systems in Hilbert spaces, Nonlinear Funct. Anal. Appl. 10 (2005), 285 - 298.
90Vu Ngoc Phat, J. Jiang, Stabilization of nonlinear discrete-time systems via a digital communication channel. Int. J. Math. Math. Sc. 1 (2005), 43 - 56.
91Vu Ngoc Phat, Robust stability and stabilizability of uncertain linear hybrid systems with state delays, IEEE Trans. on CAS II 52 (2004), 894 - 898.
92Vu Ngoc Phat, D. Q. Vinh, Controllability and H-infinity control of linear continuous time-varying uncertain systems. Diff. Equations and Appl. 4 (2004), 313 - 327.
93Vu Ngoc Phat, Jianming Jiang, Andrey V. Savkin, Ian R. Petersen, Robust stabilization of linear uncertain discrete-time systems via a limited capacity communication channel, Systems Control Letters. 53 (2004), 347 - 360.
94Vu Ngoc Phat, Nonlinear $H_\inf}$ control in Hilbert spaces via Riccati operator equation, Nonlinear Funct. Anal. Appl. 9 (2004), 79 - 92.
95Vu Ngoc Phat, N. M. Linh, On the stabilization of nonlinear continuous-time systems in Hilbert spaces, Southeast Asian Bull. Math. 27 (2003), 135 - 142.
96Nguyen 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.
97Nguyen Sinh Bay, Nguyen The Hoan, Vu Ngoc Phat, On the asymptotic stability of time-varying differential equations with multiple delays and applications, Acta Math. Vietnam. 28 (2003), 51 - 64.
98Vu Ngoc Phat, On the stability of a class of nonlinear time-delay differential control systems in Banach spaces, Diff. Equations and Appl. 3 (2003), 203 - 218.
99Vu Ngoc Phat, Complete stabilization of distributed parameter systems: A controllability analysis approach. In: Proc. 15th Int. IFAC’2002 Congress, July, 2002, Barcelona, 1325 - 1330.
100Vu Ngoc Phat, Andrey V. Savkin, Robust state estimation for a class of uncertain time-delay systems. Systems Control Letters, 47 (2002), 237 - 245.
101Vu Ngoc Phat, New stabilization criteria for linear time-varying systems with state delay and norm-bounded uncertainties. IEEE Trans. Automat. Control 47 (2002), 2095 - 2098.
102Vu Ngoc Phat, Nguyen Sinh Bay, Asymptotic stability of a class of nonlinear functional differential equations, Nonlinear Funct. Anal. Appl. 7 (2002), 299 - 311.
103Vu Ngoc Phat, Nguyen Sinh Bay, Lyapunov stability and stabilizability of linear differential time-varying delay systems in Hilbert spaces, Far East J. Math. Sci. (FJMS) 5 (2002), N0 1, 65 - 80.
104Vu 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.
105J. Y. Park, Vu Ngoc Phat, I. H. Jung, Constrained controllability of linear time-varying systems in Banach spaces, Optimization 50 (2001), 187 - 204.
106Vu Ngoc Phat, Stabilization of linear continuous time-varying systems with state delays in Hilbert spaces, Elect. J. Diff. Equations (2001), 1 - 12.
107Nguyen Manh Linh, Vu Ngoc Phat, Exponential stability of nonlinear time-varying differential equations and applications, Elect. J. Diff. Equations (2001), N0 34, 1 - 12.
108Vu Ngoc Phat, T. T. Kiet, Global controllability to a target set of a discrete-time system in Banach spaces. Nonlinear Funct. Anal. Appl. 5 (2000), 23 - 37.
109Jong 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.
110Vu Ngoc Phat, Constrained controllability theory: from linear to nonlinear dynamical discrete-time systems. East-West J. Math. 2 (2000), 1 - 19.
111Vu 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.
112Vu Ngoc Phat, Tran Tin Kiet, Lyapunov stability of nonlinear time-varying differential equationsActa Math. Vietnam. 25 (2000), N0 2, 231 - 249.
113Vu Ngoc Phat, Jong Yeoul Park, and Il Hyo Jung, Constrained controllability of linear time-varying Stability and constrained controllability of linear control systems in Banach spaces. J. Korean Math. Society 37 (2000), 593 - 612.
114P. 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.
115Vu Ngoc Phat, Introduction to mathematical control theory (in Vietnamese) – Nhập môn lý thuyết điều khiển tối ưu. NXB ĐHQG, Hanoi, 2000, 245 trang.
116Vu Ngoc Phat, Tran Tin Kiet, On the stabilizability of nonlinear systems in finite-dimensional spaces. Funct. Anal. Appl. 4 (1999), 73 - 85.
117Vu Ngoc Phat, Krein-Rutman theorem on existence of eigenvectors in Banach spaces : Recent extensions and applications. Nonl. Funct. Anal. Appl. 4 (1999), 25 - 40.
118Nguyen Sinh Bay, Vu Ngoc Phat, Stability of nonlinear discrete time-varying retarded systems. Vietnam J. Math. 27 (1999), 373 - 377.
119Vu Ngoc Phat, On the stability and stabilizability of nonlinear dynamical systems. Nonlinear Anal. Forum. 4 (1999), 65 - 75.
120Vu Ngoc Phat, On the stability of time-varying differential equations. Optimization 45 (1999), 237 - 254.
121Vu 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.
122Vu Ngoc Phat, Jong Yeoul Park, Further generalizations of Farkas' theorem and applications in optimal control. J. Math. Anal. Appl. 216 (1997), 23 - 39.
123Vu Ngoc Phat, Weak asymptotic stabilizability of discrete-time inclusions given by set-valued operators. J. Math. Anal. Appl. 202 (1996), 353 - 369.
124Vu Ngoc Phat, Constrained control problems of discrete processes. World Scientific, Singapore-New Jersey-London, 1996, 228p.
125Vu Ngoc Phat, Constrained controllability theory of dynamical systems. Dr. Sc. Thesis, Institute of Mathematics, Polish Academy of Sciences, Warszawa, Poland, 1995.
126Vu Ngoc Phat, Some aspects of constrained controllability of discrete-time dynamical systems. Optimization 33 (1995), 57 - 79.
127Vu Ngoc Phat, Constrained controllability of linear control infinite-dimensional systems: A set-valued analysis approach. IMA J. Math. Contr. Inform. 11 (1994), 185 - 199.
128Vu Ngoc Phat, Constrained controllability and reachability of linear discrete-time descriptor systems. Optimization 31 (1994), 165 - 177.
129Vu Ngoc Phat, Some remarks on controllability and reachability of nonstationary discrete-time processes. Optimization 29 (1994), 173 - 180.
130Vu Ngoc Phat, Trinh Cong Dieu, On the Krein-Rutman theorem and its applications in controllability. Proceedings of AMS 124 (1994), 495 - 501.
131Vu Ngoc Phat, K. Balachandra, On the controllability of linear descriptor systems in Banach spaces. Acta Math. Vietnam. 1 (1992), 67 - 76.
132Vu Ngoc Phat, K. Murugesan, A note on constrained controllability of linear descriptor systems. Optimization 25 (1992), 77 - 82.
133Vu Ngoc Phat, Trinh Cong Dieu, Linear control discrete-time systems with disturbances: Constrained controllability to a subset. Optimization 24 (1992), 319 - 327.
134Vu Ngoc Phat, Trinh Cong Dieu, Constrained controllability of linear discrete-time systems with constrained controls and states in Banach spaces. SIAM J. Contr. and Optim. 30 (1992), 1311 - 1319.
135Vu Ngoc Phat, Controllability problems of dynamical syatems: a set-valued approach. In: Proc. of the 36th Int. Colloquium on Applied Mathematics, Ilmelnau, Germany, October 1991, 121-132.
136Vu Ngoc Phat, Control problems of nonlinear dynamical systems with phase constraints. Inter. Series of Numerical Analysis 99 (1991), 433 - 440.
137Vu Ngoc Phat, Nguyen Khoa Son, Linear nonstationary discrete-time systems: Null controllability with restrained controls in Banach spaces. Optimization. 2 (1990), 271 - 279.
138Vu 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).
139Vu 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 11-16, 1989, 92 - 103.
140Vu Ngoc Phat, Controllability of linear discrete-time systems with multiple delays on controls and states. Int. J. Contr. 5 (1989), 1645 - 1654.
141Vu Ngoc Phat, Controllability of linear time-dependent systems with a phase constraint. Avtomatika i Telemekhanika, USSR 8 (1988), 51 - 59. English translation: Automat Remote Control 49 (1988), 998 - 1004.
142Vu Ngoc Phat, Controllability of nonlinear discrete-time systems without differentiability assumption. Optimization 19 (1988), 133 - 142.
143Vu Ngoc Phat, Approximate controllability of nonlinear discrete-time systems in Banach spaces. Acta Math. Vietnam. 13 (1988), 81 - 88.
144Vu Ngoc Phat, R.G. Faradzev and V. A. Shapiro, Controllability theory of dynamical discrete-time systems. Avtomatika i Telemekhanika, USSR 1(1986), English translation: Automat Remote Control 47 (1986), 1 - 23.
145Vu Ngoc Phat, Controllability in multivalued discrete-time processes. Kibernetika, USSR 5(1986), 62-67. English translation: Cybernetics 22 (1986), 610 - 615.
146Vu Ngoc Phat, On the controllability of nonlinear two parameter discrete-time systems with constrained controls. Optimization 16 (1985), 869 - 876.
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149Vu Ngoc Phat, Controllability of nonlinear two-parametric discrete-time systems. Probl. Optim. ASU, Bacu, USSR (1983), 171 - 179 (in Russian).
150Vu Ngoc Phat, Controllability of discrete-time systems with nonconvex restrained controls. Optimization 14 (1983), 371 - 375.
151Vu Ngoc Phat, Controllability problem of general nonlinear processes. Vietnam J. Math. 2 (1981), 27 - 31 (in Vietnamese).
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