Vietnam Journal
of
MATHEMATICS

Volume 26, Number 2, 1998

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8	Generalized Convexity and Some Applications to Vector Optimization Dinh The Luc	95
9	On Eigenvalue Problems with Singularity for Second Order Ordinary Differential Equations Ta Van Dinh	111
10	On Weak Injectivity of Direct Sums of Modules G. M. Brodskii, Mohammad Saleh, Le Van Thuyet, and Robert Wisbauera	121
11	The Regularity of Spaces of Germs of f-Valued Holomorphic Functions Nguyen Van Hao and Bui Dac Tac	129
12	On the Composition of Random Operators on Banach Spaces Dang Hung Thang	137
13	Stabitity Radii of Metzler Operators A. Fischer, D. Hinrichsen, and N. K. Son	147
14	On Nonlinear n-widths and n-term Approximation Dinh Dung	165
15	Morita Invariance of Entire Current Cyclic Homology Nguyen Van Thu	177
16	Computation of the Comass of a k-covector Doang The Hieu	181
17	Berry-Esseen Theorem for Stationary Strong Mixing Sequences Bui Khoi Dam	185