Vietnam Journal
of
MATHEMATICS

Vol. 30, Number 1, 2002

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Persistence in a Model of Predator-Prey Population Dynamics with the Action of a Parasite in Almost Periodic Environment Tran Thi Loan and Trinh Tuan Anh	1
On a Perturbed Boundary Optimal Control System Mohamed Akkouchi	15
On a Class of Locally Supersoluble Groups Edmundo R. Perez, Jr.	25
On Eventually and Asymptotically Lipschitzian Mappings Do Hong Tan and Ha Duc Vuong	31
p-Adic Poisson-Jensen Formula in Several Variables Vu Hoai An	43
New Lagrange Multipliers Rules for Constrained Quasidifferentiable Optimization Yan Gao	55
Iterative Method for Solving a Boundary Value Problem for Triharmonic Equation Dang Quang A	71
A Stable Marching Difference Scheme for an Ill-Posed Cauchy Problem for the Three-Dimensional Laplace Equation  Pham Minh Hien	79
Fractal Langevin Equation Tran Hung Thao and Tran Trong Nguyen	89
Homotopy of Configuration Spaces Nguyen Viet Dung	97