PERMANENCE AND POSITIVE BOUNDED SOLUTIONS OF KOLMOGOROV COMPETING SPECIES SYSTEM
TRINH TUAN ANH, TRAN VAN NHUNG, LE HONG LANTHE STRUCTURE OF TYPE
ON CONJUGATE MAPS AND DIRECTIONAL DERIVATIVES OF CONVEX VECTOR FUNCTIONS
NGUYEN XUAN TAN, PHAN NHAT TINHNOETHER PROPERTIES OF LINEAR OPERATORS INDUCED BY ALGEBRAIC ELEMENTS
NGUYEN VAN MAU, NGUYEN TAN HOA