## Công bố năm 1998

1. Nguyễn Minh Chương, Yu. V. Egorov, Some semilinear boundary value problems for singular integro-differential equations. Uspekhi Matematicheskikh Nauk, 53 (1998), 249 - 250.
2. Hinrichsen D., Nguyễn Khoa Sơn, Stability radii of positive discrete-time systems. 3rd International Conference on Approximation and Optimization in the Caribbean (Puebla, 1995), 113–124, Aportaciones Mat. Comun., 24, Soc. Mat. Mexicana, México, 1998.
3. Lee Gue Myung, Kim Do Sang, Byung Soo, Nguyễn Đông Yên, Lee, On a strongly monotone vector variational inequality. Nonlinear Anal. Forum 3 (1998), 151–176.
4. Hoàng Tụy, Convex analysis and global optimization. Nonconvex Optimization and its Applications, 22. Kluwer Academic Publishers, Dordrecht, 1998. xii+339 pp. ISBN: 0-7923-4818-4.
5. Đỗ Văn Lưu, General topology (in Vietnamese) – Tô pô đại cương. NXB Khoa học Kỹ thuật, Hanoi, 1998, 160 trang.
6. Hoàng Tụy, Bilevel linear programming, multiobjective linear programming and monotonic reverse convex programming. In: Multilevel Optimization: Algorithms and Applications, (P. M. Pardalos, A. Migdalas and P. Vọrbrand, eds.), Kluwer Academic Publishers, 1998, 295 - 301.
7. Hoàng Tụy, Saied Ghannadan, A new branch and bound method for bilevel linear programs. In: Multilevel Optimization: Algorithms and Applications, (P. M. Pardalos, A. Migdalas and P. Vọrbrand, eds.), Kluwer Academic Publishers, 1998, 231 - 249.
8. Hà Huy Vui, Pham Tien Son, Remark on the equisingularity of families of affine plane curves. Ann. Polonici Math. LXVIII.3 (1998), 273 - 280.
9. Hà Tiến Ngoạn, Dexing Kong; Mikio Tsuji, Integration of Monge-Ampère equations and surfaces with negative Gaussian curvature. Annali della Scuola Normale Superiore di Pisa, Scienze Fis. e Math., Serie 4, 27 (1998), 309 - 330.
10. Hà Tiến Ngoạn, Hopf's formula for Lipschitz solutions of Hamilton-Jacobi equations with concave-convex Hamiltonian. Acta Math. Vietnam. 23 (1998), 269 - 293.
11. Nguyen Ngoc Chu and Nguyen Vu Tien, A maximal volume cone algorithm for linear programming problem. Vietnam J. Math. 26 (1998), 45 - 51.
12. Gue Myung Lee, Do Sang Kim, Byung Soo Lee, Nguyễn Đông Yên, Vector variational inequality as a tool for studying vector optimization problems. Nonlinear Analysis: Theory, Methods & Applications 34 (1998), 745 - 765.
13. Nguyen Khac Viet, Geometry of families of algebraic curves, Dr. Sc. Dissertation. Moscow State Univ. 287 p., 1998.
14. Nguyen Khac Viet, On families of curves over P1 with small number of singular fibres. C. R. Acad. Sci. Paris 326 (1998), Série I, 459 - 463.
15. Nguyen Khac Viet, Semi-stable elliptic fibrations with small number of singular fibres over a base of genus 0 and 1. Vestnik of Mosk. Univ. (1998), N0 1, 66 - 68.
16. Nguyen Khac Viet, A remark on semi-stable fibrations over $P^1$ in positive characteristic. Comp. Math. 112 (1998), 41 - 44.
17. Tran Duc Van, L. V. Hap and N. D. T. Son, On some differential inequalities and the uniqueness of global semiclassical solutions to the Cauchy problem for weakly-couple systems. J. Inequal. Appl. 2 (1998), 357 - 372.
18. Tran Duc Van, Mai Duc Thanh and R. Gorenflo, A Hopf-type formula for $\frac{{\partial u}{\partial t} + H (t, u, Du) = 0. Vietnam J. Math. 26 (1998), 385 - 389. 19. Tran Duc Van, Nguyen Duy Thai Son, and Le Van Hap, Partial differential inequalities of Haar type and their applications to the uniqueness problem. Vietnam J. Math. 26 (1998), 1 - 28. 20. P.-C. Chen, P. Hansen, B. Jaumard, Hoàng Tụy, Solution of the multifacility Weber and conditional Weber problems by D. C. Programming. Oper. Res. 46 (1998), 548 - 562. 21. Apkarian, P., Hoang Duong Tuan, Parameterized LMIs in control theory, In: Proc. of 37th IEEE Conference on Decision and Control, 1998, 152-157. 22. Hoang Duong Tuan, S. Hosoe, Hoàng Tụy, D.C. optimization approach to robust controls: the optimal scaling value problem. In: Proceedings of 1997 American Control Conference, 1998, 350 - 355. 23. Hoang Duong Tuan, P. Apkarian, Robust control via concave optimization: local and global algorithms, In: Proc. of 37th IEEE Conference on Decision and Control, 1998, 3855 - 3860. 24. Hoang Duong Tuan E. Ono, P. Apkarian and S. Hosoe, Nonlinear H_{\infty$ control for an integrated suspension system via parameterized linear matrix inequality characterizations. In: Proc. of 1998 American Control Conference, 1998, 3173 - 3177.
25. Hoang Duong Tuan, S. Hosoe, On robust H_{\infty} control for nonlinear discrete and sampled-data systems. IEEE Trans. Automat. Control 43 (1998), 715 - 718.
26. E. Ono, Hosoe, S. Hoang Duong Tuan Doi, S., Bifurcation in vehicle dynamics and robust front wheel steering control. In: Proceedings of 35-th IEEE Conference on Control and Decision, IEEE press, 1777 - 1782. Also IEEE Transactions on Control Systems Technology, 6 (1998), 412 - 420.
27. Ngô Việt Trung, The Castelnuovo regularity of the Rees algebra and the associated graded ring. Trans. Amer. Math. Soc. 350 (1998), 2813 - 2832.
28. A. Simis, Ngô Việt Trung, G. Valla, The diagonal subalgebras of a blow-up ring. J. Pure Appl. Algebra 125 (1998), 305 - 328.
29. Nguyễn Minh Trí, Critical Sobolev exponent for hypoelliptic operators. Acta Math. Vietnam. 23 (1998),  83 - 94.
30. Nguyễn Minh Trí, On Grushin's equation. Mat. Zametki 63 (1998), 95 - 105.
31. R. Horst, Nguyen Van Thoai, An integer concave minimization approach for the minimum concave cost capacitated flow problem on networks. OR Spektrum 20 (1998), 47 - 53.
32. Nguyen Van Thoai, Global optimization techniques for solving the general quadratic integer programming problem. Comput. Optim. Appl. 10 (1998), 149 - 163.
33. Nguyen Van Thoai, On Tikhonov's reciprocity principle and optimality conditions in d.c. optimization. J. Math. Anal. Appl. 225 (1998), 673 - 678.
34. Tran Hung Thao, Sur une classe de diffusions etudiée dans la thermodynamique. In : Proceedings of the International Conference EMT'97 on Engineering Mechanics Today, Hanoi, 1998, 178 - 182.
35. Nguyễn Quốc Thắng, Corestriction principle in non-abelian Galois cohomology. Proc. Japan Academy 74 (1998), 63 - 67.
36. Nguyễn Xuân Tấn, P. N. Tinh, On the existence of equilibrium points of vector functions. Numer. Funct. Anal. Optim. 19 (1998), 141 - 156.
37. Ngô Đắc Tân, Sufficient conditions for the existence of a Hamilton cycle in cubic (6, n)-metacirculant graphs, II. Vietnam J. Math. 26 (1998), 217 - 228.
38. Do Hong Tan, A classification of contractive mappings in probabilistic metric spaces. Acta Math. Vietnam. 23 (1998), 295 - 302.
39. T. V. Thiệu, Bui The Tam, Các phương pháp tối ưu hoá (in Vietnamese). NXB Giao thông vận tải 1998, 408 trang.
40. Nguyễn Khoa Sơn, D. Hinrichsen, $\mu$ analysis and robust stability of positive linear systems. Appl. Math. Comput. Sci. 8 (1998), N0 2, 253 - 268.
41. Nguyễn Khoa Sơn, Pham Huu Anh Ngoc, Complex stability radius of linear retarded systems. Vietnam J. Math. 26 (1998), 379 - 384.
42. D. Hinrichsen, Nguyễn Khoa Sơn, Stability radii of positive discrete-time systems under affine parameter perturbations, Int. J. for Nonlinear & Robust Control, 8 (1998), 1169 - 1188.
43. A. Fischer, D. Hinrichsen, Nguyễn Khoa Sơn, Stability radii of Metzler operators. Vietnam J. Math. 26 (1998) 147 - 162.
44. Phạm Hữu Sách, Sufficient conditions for reachability and controllability of discrete systems with phase constraints. Optimization 43 (1998), 303 - 321.
45. Phạm Hữu Sách, J. P. Penot, Characterizations of generalized convexity via generalized directional derivative. Numer. Funct. Anal. Optim. 19 (1998), 615 - 634.
46. Hoàng Xuân Phú, Roughly convex functions. In: Proceeding of the Korea - Vietnam Joint Seminar "Mathematical Optimization Theory and Applications", Editors: Do Sang Kim and Pham Huu Sach, Pusan 1998, 73 - 85.
47. Vu Quoc Phong F. Yao, On similarity to contraction semigroups in Hilbert space. Semigroup Forum 56 (1998), 197 - 204.
48. Phong, Vu Quoc; Schüler, E., The operator equation $AX-XB=C$, admissibility, and asymptotic behavior of differential equations. J. Differential Equations 145 (1998), N0 2, 394 - 419.
49. Vũ Ngọc Phát, 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.
50. Nguyen To Nhu and Paul Sisson, A rigid space homeomorphic to Hilbert space. Proc. Amer. Math. Soc. 126 (1998), N0 1, 85 - 95.
51. Nguyen To Nhu, H. T. Nguyen, A negative version of Choquet theorem for Polish spaces. East-West J. Math. 1 (1998), 61 - 71.
52. Le Thi Hoai An, Pham Dinh Tao, Lê Dũng Mưu, A combined D.C. optimization-ellipsoidal branch-and-bound algorithm for solving nonconvex quadratic programming problems. J. Comb. Optim. 2 (1998), 9 - 28.
53. B. D. Craven, Đỗ Văn Lưu, Lagrangian conditions for a nonsmooth vector-valued minimax. Journal of the Australian Mathematical Society (Series A), 65 (1998), 163 - 175.
54. Dinh The Luc, Generalized convexity and some applications to vector optimization. Vietnam J. Math. 26 (1998), 95 - 110.
55. V. Jeyakumar and D. T. Luc, Approximate Jacobian matrices for nonsmooth conti-nuous maps and $C^1$-optimization. SIAM J. Control Optim. 36 (1998), 1815 - 1832.
56. V. Jeyakumar, D. T. Luc, S. Schaible, Characterizations of generalized monotone nonsmooth continuous maps using approximate Jacobians. J. Convex Analysis 5 (1998), 119 - 132.
57. Alejandro Jofré, Dinh The Luc, Michel Théra, $\epsilon$-subdifferential and $\epsilon$-monotonicity. J. Nonlinear Analysis: Theory, Methods and Appl. 33 (1998), 71 - 90.
58. Phan Nhat Tinh, Dinh The Luc, Nguyễn Xuân Tấn, Subdifferential characterizations of quasiconvex and convex vector functions. Vietnam J. Math. 26 (1998), 53 - 69.
59. Dinh The Luc, Nguyễn Xuân Tấn, Phan Nhat Tinh, Convex vector functions and their subdifferentials. Acta Math. Vietnam. 23 (1998), 107 - 127.
60. Tran Gia Lich, On method to determine the solution values at the boundary for the vertiacal two-dimensional equation system. Vietnam J. Mech. XX (1998), N0 3, 24 - 36.
61. Le Hoi, Process of formation of socio-economic environment policies. Economic studies 236 (1998), N0 1, 17 - 22.
62. Lê Tuấn Hoa, Ngô Việt Trung, On the Castelnuovo-Mumford regularity and the arithmetic degree of monomial ideals. Math. Z. 229 (1998), 519 - 537.
63. Đinh Nho Hào, H.-J. Reinhardt and Y. Jarny, A variational method for multi-dimensional inverse heat conduction problems. Matimyas Matematika August 1998, 48 - 56.
64. Đinh Nho Hào, H.-J. Reinhardt, Gradient methods for inverse heat conduction problems. Inverse Problems in Engineering 6 (1998), 177 - 211.
65. Đinh Nho Hào, Methods for inverse heat conduction problems. 249 pages. Peter Lang, Frankfurt am Main - Bern - New York - Paris, 1998.
66. Đinh Nho Hào, H.-J. Reinhardt, On the numerical solution of inverse heat conduction problems by gradient methods. In: Theory and Practice ASME, D. Delaunay, Y. Jarny, K. A. Woodbury (eds.), Inverse Problems in Engineering. New York, 1998, 385 - 392.
67. Nguyen Viet Dung, Indecomposable decompositions of pure-injective modules. Comm. Algebra 26 (1998), 3709 - 3725.
68. Nguyen Viet Dung, A. Facchini, Direct summands of serial modules. J. Pure Appl. Algebra 133 (1998) 93 -106.
69. Đỗ Ngọc Diệp, Witten-Jeffrey-Kirwan localization formula for reduction at regular coadjoint orbits. Matimyas Matematika, Special Issue, August 1998, In: Proceedings "International Conference on Inverse Problems and Applications", February 23 - 27, 1998, 93 - 108.
70. D. T. Luc, Pham Huy Dien, Nguyễn Xuân Tấn, Tạ Duy Phượng, Giải tích toán học - các nguyên lý cơ bản & tính toán thực hành. NXB Giáo dục, Hanoi, 1998 (in Vietnamese).
71. D. T. Luc, Pham Huy Dien, Tạ Duy Phượng, Thực hành tính toán trên chương trình Maple V. NXB Giáo dục, Hanoi, 1998 (in Vietnamese).
72. Nguyễn Tự Cường, Remarks on the non-Cohen-Macaulay locus of Noetherian schemes. Proc. Amer. Math. Soc. 126 (1998), 1017 - 1022.
73. Nguyễn Tự Cường, Nguyen Duc Minh, On the length of generalized fractions of modules having polynomial type <= 2. Vietnam J. Math. 26 (1998), 87 - 90.
74. Bùi Công Cường, N. T. Huong and P. V. H. Van, Some algorithms in group decision making using consensus measures. In: Proceeding Vietnam-Japan Bilateral Simposium on Fuzzy Systems and Applications, Halong Bay, Vietnam , 1998, 506 - 512.
75. Bùi Công Cường, N. H. Phuong, Fuzzy systems and applications (in Vietnamese) – Hệ mờ và ứng dụng. NXB Khoa học Kỹ thuật, Hà Nội, 1998, 414 trang.
76. Bùi Công Cường, B. M. Tri, Lectures on probability theory and applied statistics (in Vietnamese) – Bài giảng về lý thuyết xác suất và thống kê ứng dụng. NXB Giao thông vận tải, Hà Nội, 1998, 340 trang.
77. Hà Huy Bảng, Hoang Mai Le, Note on the Kolmogorov-Stein inequalityVietnam. J. Math. 26 (1998), 363 - 366.

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