Vietnam Journal
of
MATHEMATICS

Volume 23, Number 1, 1995


1

Some Aspects of the Theory of Stochastic Integrals

Dang Hung Thang

1

2

A Survey of Regularity Conditions and the Simplicity of Prime Factor Rings
Gary F. Birkenmeier

29

3

The Action of the mod p Steenrod Operations on the Modular Invariants of Linear Groups
Nguyen Huu Viet Hung and Pham Anh Minh

39

4

A Sufficent Condition for Hamiltonian Cycles in Tough Graphs

Vu Dinh Hoa

57

5

On Balayage Principles by Inverse Source Problems
Le Trong Luc

69

6

On Globally Minimal Steiner Networks with Convex Boundary Points on the Plane

Nguyen Huu Quang

77

7

Computational Aspects of Optimization Problems over the Efficient Set
Le Dung Muu

85

8

The AR-Property for Kalton Sets

Tran Van An

107

9

The Dual Algorithm for Minimizing the Sum of Absolute Values of Linear Functions

Pham The Long and Dao Thanh Tinh

117

10

Multidimensional Quantization and the Degenerate Principal Series Representations

Do Ngoc Diep

131

11

Rings Whose Finitely Generated Modules Are Extending

Dinh Van Huynh, S. Tariq Rizvi and M. F. Yousif

137

12

Representation of Lipschitz Global Solutions of the Cauchy Problem for Hamilton-Jacobi Equations

Tran Duc Van and Nguyen Hoang

139

13

On Minimax Solutions of First Order Nonlinear PDEs with t-Measurable Hamiltonians

Nguyen Duc Thai Son and Nguyen Dac Liem

145

14

On the Real Stability Radius of Positive Linear Systems

Nguyen Khoa Son

151

15

On Direct and Inverse Theorems in Multivariate Trigonometric Approximation

Dinh Dung

157