Vietnam Journal
of
MATHEMATICS

Volume 29, Number 3, 2001


20

Non-Linear Approximations using Wavelet decompositions
Dinh Dung

197

21

Direct Sums of Type 2 c - Extending Modules
Liu Zhongkui

225

22

On Penalty Function Method for a class of Nonconvex Constrained Optimization Problems
Nguyen Van Quy and Le Dung Muu

235

23

A free boundary Problem for heat Equation Arising in Infiltration
Nguyen Dinh Tri and Nguyen Dinh Binh

257

24

Two-Weight Inequality for fractional Integral Operations and Adams Inequality
Y. Rakotondratsimba

269

25

On Multipoint Boundary-Valued Problems for Linear Implicit Non-autonomous Systems of Difference Equations
Pham Ky Anh and Le Cong Loi

281

26

Non-Singular Cubic Surfaces with Star Points
Nguyen Chanh Tu

287