Vietnam Journal
of
MATHEMATICS

Volume 22, Numbers 1&2, 1994


1

Rings with certain modules CS

Patrick F. Smith

1

2

A note on the solution of a special class of nonconvex optimization problems
Tran Vu Thieu

38

3

On multi-parameter asymptotic error expansions for multi-dimensional diffusion-convection equations
Ta Van Dinh and Dang Quang A

47

4

On quadratic bundles of operators, connected with stability problems

Bui Ta Long

55

5

Employment of conical algorithm and outer approximation method in d.c. programming
Nguyen Van Thoai

71

6

p-Groups with cyclic Frattini subgroup

Nguyen Viet Duc and Pham Anh Minh

86

7

Sự hội tụ của tổng các toán tử độc lập trên đại số Von Neumann
Nguyễn Văn Quảng

94

8

Minimax solutions of the Cauchy problems for systems of first-order nonlinear differential equations

Tran Duc Van and Nguyen Dac Liem

104

9

On the existence of positive eigenvalues for convex set-valued maps

Nguyen Khoa Son

109

10

Boundary operator method for approximate solution of biharmonic type equation

Dang Quang A

114