Dedicated to Pham Huu Sach on the occasion of his sixtieth birthday
SECOND-ORDER OPTIMALITY CONDITIONS FOR $C^1$ MULTIOBJECTIVE PROGRAMMING PROBLEMS
A. GUERRAGGIO, D. T. LUC, N. B. MINHNECESSARY OPTIMALITY CONDITIONS IN PROBLEMS INVOLVING SET-VALUED MAPS WITH PARAMETERS
PHAN QUOC KHANH, LE MINH LUUA COUNTEREXAMPLE ON THE CLOSEDNESS OF THE CONVEX HULL OF A CLOSED CONE IN $R^n$
G. M. LEE, J. Y. SHIN, H. S. SIMINCREASING POSITIVELY HOMOGENEOUS FUNCTIONS DEFINED ON $\mathbb R^n$
J. E. MARTINEZ-LEGAZ, A. M. RUBINOVMETHODS FOR FINDING GLOBAL OPTIMAL SOLUTIONS TO LINEAR PROGRAMS WITH EQUILIBRIUM CONSTRAINTS
LE DUNG MUU, NGUYEN VAN QUYDIRECTIONAL DIFFERENTIABILITY OF THE OPTIMAL VALUE FUNCTION IN INDEFINITE QUADRATIC PROGRAMMING
NGUYEN NANG TAMON EXPLICIT VISCOSITY SOLUTIONS TO NONCONVEX-NONCONCAVE HAMILTON-JACOBI EQUATIONS
TRAN DUC VAN, MAI DUC THANHLINEAR OPERATORS SATISFYING THE ASSUMPTIONS OF SOME GENERALIZED LAX-MILGRAM THEOREMS
NGUYEN DONG YEN, BUI TRONG KIM