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Published online by Cambridge University Press: 17 February 2009
The sufficient optimality conditions and duality results have recently been given for the following generalised convex programming problem:
where the funtion f and g satisfy
for some η: X0 × X0 → ℝn
It is shown here that a relaxation defining the above generalised convexity leads to a new class of multi-objective problems which preserves the sufficient optimality and duality results in the scalar case, and avoids the major difficulty of verifying that the inequality holds for the same function η(. , .). Further, this relaxation allows one to treat certain nonlinear multi-objective fractional programming problems and some other classes of nonlinear (composite) problems as special cases.