Duality of variational problems with a new approach

The present investigation introduces the third order duality in variational problems, as because, in certain situations, first and second order duality do not yield solutions but it succeeds in finding the desired results. The duality results for the pair of variational primal problems and their corresponding third order dual problems are demonstrated. Counterexamples are provided to justify the importance of the current research work. It is found that many reported results of the literature are particular cases of this paper.

Second order duality for mathematical programming involving n-set functions

The notion of second order convexity and its generalization for $n$-set functions are introduced. Mond-weir type second order duality is formulated for the general mathematical programming problems involving $n$-set functions, and proved desired duality theorems. Further, counterexamples are illustrated in support of the present investigation.