Vietnam Journal
of
MATHEMATICS
Vol. 28, Number 4, 2000

1 Some Sufficient Conditions for the Existence of Equiblirium Points    Concerning Multivalued Mappings
Nguyen Ba Minh and Nguyen Xuan Tan
295
2 On the L - Minimizing Networks in Rn
Nguyen Huu Quang
311
3 Is a Right Perfect Right Self-Injective Ring Right PF?
Dinesh Khurana
321
4 An Algorithm for Optimizing Over the Efficient Set
Nguyen Thi Bach Kim
329
5 Bounds for Cohomological Hilbert-Functions of Projective Schemes Over Artinian Rings
M. Brodmann, C. Matteotti, and Nguyen Duc Minh
341
6 On Entropy Numbers and Non-Linear Approximation by Sets of Finite Pseudo-Dimension
Dinh Dung
381