Vietnam Journal
of
MATHEMATICS

Volume 26, Number 1, 1998

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1	Partial Differential Inequalities of Haar Type and Their Applications to the Uniqueness Problem Tran Duc Van, Nguyen Duy Thai Son, and Le Van Hap	1
2	Compactification Methods in a Control Problem of Jump Processes under Partial Observations Nguyen Huu Du	29
3	A Maximal Volume Cone Algorithm for Linear Programming Problems Nguyen Ngoc Chu and Nguyen Vu Tien	45
4	Subdifferential Characterization of Quasiconvex and Convex Vector Functions Phan Nhat Tinh, Dinh The Luc, and Nguyen Xuan Tan	53
5	Convergence of the Rademacher Series in a Banach Space Nguyen Duy Tien and Vidal Vazquez Ricardo	71
6	On the Length of Generalized Fractions of Modules Having Polynomial Type ≤ 2 Nguyen Tu Cuong and Nguyen Duc Minh	87
7	A Remark on Analytic Pseudodifferential Operators with Singularities Nguyen Si Anh Tuan	91